Two-Eyed Seeing, known in Mi’kmaq as Etuaptmumk, is a guiding principle that asks people to learn from one eye with the strengths of Indigenous knowledge and from the other eye with the strengths of Western scientific knowledge, then to use both eyes together for the benefit of all. Mi’kmaq Elder Albert Marshall coined the term in 2004, and it has since become one of the most widely referenced frameworks for bridging Indigenous and Western ways of knowing across fields from health care to fisheries management to classroom teaching. The concept sounds deceptively simple, but its practical application raises hard questions about how two fundamentally different worldviews can work alongside each other without one swallowing the other.
Origins and Core Meaning
Elder Albert Marshall introduced Two-Eyed Seeing during a 2004 conversation about integrating Indigenous and Western knowledge in the sciences. He has consistently described it not as an academic methodology but as a way of living. As Marshall puts it, Two-Eyed Seeing “does not fit into any particular subject area or discipline. Rather, it is about life: what you do, what kind of responsibilities you have, how you should live while on Earth… i.e., a guiding principle that covers all aspects of our lives: social, economic, environmental, etc.”1PubMed Central. How is Etuaptmumk/ Two-Eyed Seeing characterized in Indigenous health research? A scoping review – Section: Results That breadth is intentional. Two-Eyed Seeing is not a recipe for designing a study or a checklist for a grant application. It is a relational principle, rooted in the understanding that no single knowledge system holds a monopoly on useful truths.
A scoping review of 80 publications that engaged with Etuaptmumk identified seven categories researchers used to describe its meaning: a guide for life, a responsibility for the greater good and future generations, a co-learning journey, a framework for multiple or diverse perspectives, a recognition of spirit, a path toward decolonization and self-determination, and an acknowledgment that humans are part of ecosystems.2PubMed Central. How is Etuaptmumk/ Two-Eyed Seeing characterized in Indigenous health research? A scoping review Those categories give a sense of why Two-Eyed Seeing resonates so widely: it speaks to researchers in health, ecology, and social science on their own terms while refusing to be reduced to any one of them.
How It Entered the Research and Policy Landscape
Two-Eyed Seeing moved from informal guiding principle to institutional policy relatively quickly. By 2011, the Canadian Institutes of Health Research (CIHR) Institute of Aboriginal Peoples’ Health had adopted it as part of its five-year strategic plan. The following year, CIHR began directing funding specifically toward research that applied Two-Eyed Seeing principles to health studies.3International Journal of Qualitative Methods. Applications of Two-Eyed Seeing in Primary Research Focused on Indigenous Health: A Scoping Review That kind of institutional uptake mattered because it signaled to researchers that working across knowledge systems was not just philosophically interesting but fundable.
The body of published work applying Two-Eyed Seeing has grown rapidly. All 80 articles identified in the scoping review mentioned earlier were published after 2007, and 65 of those appeared from 2015 onward.4PubMed Central. How is Etuaptmumk/ Two-Eyed Seeing characterized in Indigenous health research? A scoping review Among those with empirical designs, about a third used community-based participatory methods, which aligns with Two-Eyed Seeing’s emphasis on relationship, reciprocity, and shared ownership of the research process.
Applications in Indigenous Health
Health research is where Two-Eyed Seeing has been applied most visibly, partly because the health disparities affecting Indigenous communities are so stark and partly because purely Western clinical models have often failed those communities. One area where the framework has shown particular promise is in the treatment of substance use disorders and intergenerational trauma. Researchers in Northern Ontario developed an approach called Indigenous Healing and Seeking Safety (IHSS) that blends traditional Indigenous healing practices with Seeking Safety, an evidence-based Western therapeutic model designed for people dealing with trauma and substance use together.5International Journal of Qualitative Methods. The Application of Two-Eyed Seeing Decolonizing Methodology in Qualitative and Quantitative Research for the Treatment of Intergenerational Trauma and Substance Use Disorders
An evaluation of this blended approach in a four-week harm-reduction residential treatment program found that participants valued both the cultural healing elements and the Western therapeutic model. The combination of harm reduction with traditional healing methods enhanced outcomes beyond what either approach achieved alone.6PubMed Central. Implementation and evaluation of a two-eyed seeing approach using traditional healing and seeking safety in an indigenous residential treatment program in Northern Ontario This matters because Indigenous communities have long been offered treatment programs designed entirely within Western frameworks, and those programs have often produced poor retention and trust. A Two-Eyed Seeing model does not ask participants to choose between their cultural identity and their treatment. It lets both systems contribute what they do best.
Despite these promising examples, a persistent challenge is that many researchers invoke Two-Eyed Seeing in their publications without clearly explaining how they put it into practice. The scoping review of health research noted ongoing ambiguity about how Two-Eyed Seeing has been operationalized, meaning that citing the principle and actually doing the relational, co-learning work it calls for are not always the same thing.7International Journal of Qualitative Methods. Applications of Two-Eyed Seeing in Primary Research Focused on Indigenous Health: A Scoping Review
Environmental Management and Land Stewardship
If health is where Two-Eyed Seeing has the longest publication record, environmental science is where some of its most tangible case studies live. Fisheries management offers a useful illustration. Indigenous peoples in many parts of Canada have observed and managed fish populations for thousands of years, developing knowledge about spawning patterns, habitat changes, and ecosystem health that Western fisheries science only partially overlaps with. Researchers have argued that Two-Eyed Seeing provides a path to what they call “plural coexistence,” where time-tested Indigenous knowledge systems can be paired with Western scientific insights rather than subsumed by them.8Fish and Fisheries. “Two‐Eyed Seeing”: An Indigenous framework to transform fisheries research and management Three Canadian aquatic case studies explored through this lens showed that co-developing research questions, documenting and mobilizing knowledge from both traditions, and co-producing management decisions led to richer insights than either tradition produced alone.
Fire management is another area where Two-Eyed Seeing has changed the conversation. In collaboration with the Karuk Tribe Department of Natural Resources in northern California, researchers built a simulation model of cultural burning across a large landscape within Karuk Aboriginal Territory. The model drew on Tribal members’ generational knowledge, historical maps, ethnographies, and ecological studies to estimate how, where, and when cultural ignitions shaped the landscape before colonization. The results demonstrated the importance of cultural burning for creating and maintaining the ecosystems that existed at the time of European contact, and underscored the need for collaborative work with Indigenous communities to restore those ecocultural processes.9PubMed. Blending Indigenous and western science: Quantifying cultural burning impacts in Karuk Aboriginal Territory A separate gathering of tribal elders, scientists, and resource managers concluded that integrating traditional knowledge with Western science for improved forest stewardship would require enduring commitments to knowledge sharing that extend beyond the usual boundaries of professional training.10Journal of Forestry. Listening and Learning from Traditional Knowledge and Western Science: A Dialogue on Contemporary Challenges of Forest Health and Wildfire
More recently, earth observation technology has been brought into Two-Eyed Seeing frameworks. A study examining long-term wildfire and landscape changes found that weaving local Indigenous knowledge with quantitative satellite data improved analytical precision and provided a collaborative foundation for developing strategies to address increasingly severe fire regimes.11Remote Sensing. Earth Observation Data and Indigenous Perspectives: Two-Eyed Seeing Approach to Understanding Long-Term Wildfire and Landscape Changes Western remote sensing can tell you that a landscape burned on a certain date and at a certain severity. Indigenous knowledge can tell you what that landscape looked like before decades of fire suppression, why it burned the way it used to, and what the land needs to recover. Neither account is complete by itself.
A Gap Between Principle and Practice in Conservation Law
The environmental case studies above suggest real progress, but the picture is less encouraging when you look at whether institutions have actually changed how they operate. Canada’s Species at Risk Act (SARA) formally commits to considering Indigenous knowledge in decisions about endangered species. A study examining 823 species status assessments published between 1998 and 2023 found no evidence that the inclusion of Indigenous knowledge and science had improved over that quarter century. Researchers scored each assessment against five elements of Indigenized conservation: centering Indigenous sovereignty, incorporating place-based knowledge, emphasizing interconnectedness, drawing from Indigenous knowledge sources, and recognizing the cultural importance of species. The mean composite score across assessments remained low, sitting at just 0.9 out of 5 as recently as 2023, though assessments in northern jurisdictions tended to perform slightly better.12PubMed Central. Endangered species laws and the inclusion of Indigenous knowledges and sciences in risk assessments This is a pointed finding. A law can reference Indigenous knowledge on paper while the bureaucratic process for assessing species risk continues to rely almost exclusively on Western ecological methods.
The gap between policy language and practice is one of the most persistent criticisms of how Two-Eyed Seeing gets taken up by non-Indigenous institutions. When a government or university invokes the framework in a strategic plan but does not fund, staff, or structurally support the relational work it requires, the phrase can become decorative rather than substantive.
Teaching With Both Eyes Open
In education, Two-Eyed Seeing has been developed into formal teaching frameworks aimed at science classrooms at all levels. The Two-Eyed Seeing Education for Science Education (TESSE) Framework was designed to act as an interface between Indigenous and Western knowledge systems, supporting culturally responsive science teaching for all students, not just Indigenous learners.13Canadian Journal of Science, Mathematics and Technology Education. A Two-Eyed Seeing Teaching and Learning Framework for Science Education Its developers positioned it as strengths-based, meaning it highlights what each knowledge system does well rather than positioning one as the standard and the other as supplementary.
A systematic mapping review of Two-Eyed Seeing in education from preschool through graduate school found that it holds particular promise for increasing Indigenous students’ engagement with science content.14PubMed Central. A Systematic Mapping Literature Review on Two-Eyed Seeing in P-20 Education The logic is straightforward: when a curriculum treats your community’s understanding of the natural world as irrelevant or invisible, you are less likely to see yourself as someone who does science. Two-Eyed Seeing approaches make space for Indigenous students to bring their knowledge into the classroom as a legitimate starting point rather than something to be corrected.
There is a broader pedagogical argument here that extends beyond Indigenous students. Western science education tends to present science as a singular method of producing knowledge, full stop. Two-Eyed Seeing challenges that framing by teaching students that multiple rigorous knowledge systems exist, each with different strengths and limitations. For non-Indigenous students, this can deepen their understanding of what science is and is not, how different cultures have observed and made sense of the natural world, and why humility about any single system’s completeness is itself a scientific value.
Tensions and Honest Difficulties
Two-Eyed Seeing is not without its critics, and the most thoughtful critiques come from people who take the framework seriously rather than dismissing it. A core tension is between the desire to foster dialogue across knowledge systems and the reality that some aspects of Indigenous and Western worldviews genuinely contradict each other. Indigenous knowledge systems tend to be holistic, relational, and grounded in spiritual understandings of the natural world. Western science tends to be reductionist, mechanistic, and deliberately separated from spiritual claims. Scholars examining this tension have noted that a more critical application of Two-Eyed Seeing could help make clear which areas are fruitful for collaboration and which areas involve antithetical approaches that cannot simply be blended.15AlterNative: An International Journal of Indigenous Peoples. Confronting the contradictions between Western and Indigenous science: a critical perspective on Two-Eyed Seeing
This critique does not reject Two-Eyed Seeing. It argues for a more honest version of it: one that names the contradictions openly rather than papering over them with vague appeals to integration. Interestingly, the same analysis pointed out that certain traditions within Western science, like the qualitative empiricism associated with Goethean science, are authentically resonant with Indigenous approaches. The two eyes do not always see differently. But when they do, pretending otherwise does not serve either tradition.
Power dynamics add another layer of difficulty. When Western-trained researchers lead a project and invite Indigenous knowledge holders to contribute, the structure of the collaboration can replicate the very hierarchies Two-Eyed Seeing is supposed to dissolve. Researchers examining health and well-being outcomes from Two-Eyed Seeing collaborations affecting Indigenous lands, waters, and resources have noted ongoing challenges with knowledge hierarchies, stressing the importance of mutual acknowledgment across systems.16Environment and Planning F. Advancing Indigenous futures with two-eyed seeing: Strategies for restoration and repair through collaborative research If one eye always gets to decide what counts as evidence, the seeing is not genuinely two-eyed.
Research Sovereignty and Who Controls the Process
Connected to the power question is the issue of research sovereignty: who gets to decide what is studied, how, and for whose benefit. Indigenous communities have decades of experience being studied by outsiders whose work extracted knowledge, published findings, and returned little to the communities involved. Two-Eyed Seeing is sometimes used as a framework for pushing back against that pattern.
Research on Indigenous research sovereignty in Canada has identified a long list of barriers: hesitation and mistrust from past research experiences, power dynamics between institutions and communities, differing worldviews, miscommunication, the tendency to treat all Indigenous peoples as interchangeable, and systemic institutional barriers. But the same research identified supports that align with Two-Eyed Seeing: following data sovereignty principles, including culture and protocol in the research process, using Indigenous and community-led methods, developing genuine partnerships between communities and institutional allies, and pushing for the decolonization of research institutions themselves.17Faculty of Graduate and Postdoctoral Studies (Electronic Theses and Practica). “Ogitchidaa”, an Indigenous perspective on research sovereignty in Canada: Anishinaabe, Nēhinan (Cree), Saulteaux and Red River Métis voices from Manitoba and Saskatchewan
In practice, Two-Eyed Seeing has informed research methods in ways that go well beyond choosing a mixed-methods design. One project used the framework to guide how researchers engaged with colonial archives, establishing a historical narrative from Canadian federal and provincial records and then placing that narrative alongside oral histories from Mi’kmaq Elders and knowledge holders. The colonial archive told one story about the emergence of social assistance policy; the oral histories told another. Neither was complete without the other, and the relationship between the two was itself a finding.18Area. Two‐eyed‐seeing/Etuaptmumk in the colonial archive: Reflections on participatory archival research
Energy Transition and Emerging Applications
Two-Eyed Seeing has begun appearing in fields far from its roots in health and ecology. Energy transition research in Canada’s Northwest Territories has used the framework alongside conversational methods to facilitate knowledge co-production about moving northern communities away from fossil fuels. The researchers framed the choice of methodology itself as an act of decolonization, treating Indigenous and non-Indigenous perspectives as equally valid starting points for understanding what a just energy transition looks like in the North.19Heliyon. Northern energy transition through Indigenous perspectives: A Two-Eyed Seeing approach to just transition in the Northwest Territories – Section: Methods and analysis
Energy infrastructure decisions in northern and remote communities disproportionately affect Indigenous peoples, who often live downstream, downwind, or on the land impacted by extraction projects. Western energy policy tends to evaluate transitions through cost-benefit analyses, emissions modeling, and grid reliability metrics. Indigenous perspectives foreground relationships to the land, long-term ecological stewardship, and the social fabric of communities. A Two-Eyed Seeing approach does not dismiss the economic modeling but insists that the relational and ecological dimensions sit alongside it in the decision-making process rather than showing up as afterthoughts in an environmental impact statement.
Parallel Frameworks Around the World
Although Two-Eyed Seeing is specifically Mi’kmaq in origin, similar ideas exist in Indigenous communities globally. Researchers in fisheries management have drawn parallels between Two-Eyed Seeing and other Indigenous frameworks from around the world that call for knowledge coexistence rather than knowledge competition.20Fish and Fisheries. “Two‐Eyed Seeing”: An Indigenous framework to transform fisheries research and management The specifics differ: different peoples have their own metaphors, protocols, and relationships to the land. But the shared recognition that Western science is powerful yet incomplete, and that Indigenous knowledge systems offer insights that Western tools alone miss, shows up across continents and contexts.
This is worth noting because Two-Eyed Seeing is sometimes misunderstood as an argument that Western science is wrong or should be replaced. It is not. Elder Marshall has been clear that the framework asks for both eyes, not one instead of the other. The challenge, and it remains a live one, is building institutions that can genuinely hold two ways of seeing at the same time without defaulting to the one that already has more power, more funding, and more people in the room.