Humans have killed whales for centuries, driven by shifting combinations of economic need, cultural tradition, and political stubbornness. What began as coastal subsistence hunting evolved into a globe-spanning industry that nearly wiped out several species. Today, despite a global moratorium on commercial whaling since 1986, thousands of whales still die each year from direct hunting, ship collisions, and other human activities.
Oil, Light, and Fashion: The Industrial Era
For most of whaling’s history, the answer to “why” was straightforward: whale bodies were extraordinarily useful. Blubber was boiled down into oil that fueled lamps and made long-burning, bright candles. Sperm whales were especially prized because a cavity in their heads holds up to a couple hundred gallons of a waxy substance called spermaceti, which yielded a higher-grade oil. Whale oil also went into soap, cosmetics, and lubricants for machinery.
Beyond oil, the flexible plates in a whale’s mouth, known as baleen or “whalebone,” were shaped into corset stays, dress hoops, and buggy whips. In an era before plastics and petroleum, whale products filled roles that dozens of synthetic materials would later replace. The 18th and 19th centuries saw whaling fleets expand dramatically, hunting populations of right whales, bowheads, and sperm whales to the brink of collapse. By the time petroleum and spring steel made whale products obsolete, the damage was done.
Why Some Countries Still Hunt Whales
The International Whaling Commission adopted a moratorium on commercial whaling in 1986 after decades of overexploitation. That ban is still technically in place, but three nations continue to catch whales commercially. Norway filed a formal objection to the moratorium, meaning it never accepted the ban as binding. Iceland holds a reservation that allows it to opt out. Both countries set their own catch limits and target North Atlantic common minke whales within their own waters; Iceland has also taken North Atlantic fin whales.
Japan took a different path. For decades it hunted whales under a controversial provision allowing kills “for purposes of scientific research,” selling the resulting meat commercially. In 2019, Japan left the IWC entirely, freeing itself from the moratorium, and resumed openly commercial whaling the same year.
The stated justifications vary. Norway frames whaling as a traditional coastal livelihood. Japan describes it as a food culture stretching back generations. But the economic reality is thin. A 2006 study found that 95% of Japanese people rarely or never eat whale meat. In Iceland, most whale meat is consumed by tourists rather than locals. Norway’s whaling industry requires government subsidies, and the government actively campaigns to boost domestic demand just to match the supply already being harvested. In all three countries, demand for whale meat is shrinking.
Indigenous Subsistence Hunting
Separate from commercial whaling, the IWC permits aboriginal subsistence whaling for indigenous communities in four countries: the United States (Alaskan Iñupiat and other groups), Russia (Chukotka), Denmark (Greenland), and St. Vincent and the Grenadines. These hunts are governed by strict quotas and are not designed to maximize catches or generate profit.
The IWC’s criteria focus on two things: keeping hunted populations at healthy levels, and allowing indigenous peoples to harvest at rates appropriate to their long-standing cultural and nutritional needs. For many of these communities, whale meat and blubber remain a meaningful food source, and the hunts carry deep spiritual and social significance that predates industrial whaling by thousands of years. The scale is small, typically dozens of animals per year across all four nations combined.
Scientific Whaling and Its Critics
Article VIII of the International Convention for the Regulation of Whaling allows member nations to issue “special permits” for killing whales in the name of scientific research. Japan was by far the largest user of this provision, running two major research programs in the Antarctic and North Pacific that killed hundreds of minke and fin whales annually for decades.
Critics argued the science was a legal fig leaf. In 2014, the International Court of Justice ruled that Japan’s Antarctic research program (JARPA II) was not genuinely scientific in design, noting that lethal methods must be shown to be indispensable to the research objectives. IWC guidelines adopted by consensus require any nation proposing a lethal research program to demonstrate why non-lethal methods are insufficient. The court’s ruling, along with IWC resolutions dating back to 1986, reinforced the principle that killing whales for research should be a last resort, not a routine practice. Japan’s eventual departure from the IWC in 2019 made the legal question moot, at least for Japan, by converting its hunts into openly commercial operations.
Ship Strikes and Fishing Gear
Direct hunting is no longer the leading cause of human-caused whale deaths globally. Ship strikes and entanglement in fishing gear now kill far more whales than harpoons in most ocean basins. The problem is especially severe for the North Atlantic right whale, one of the most endangered large whale species on Earth, with a population of roughly 380 individuals and only about 70 reproductively active females.
A 2024 study published in Scientific Reports estimated that vessel strikes alone kill approximately 17.5 North Atlantic right whales per year in U.S. waters. That figure is nearly eight times higher than the 2.4 deaths per year that are physically documented, because most struck whales sink and are never recovered. Large ocean-going vessels account for about 78% of that mortality risk. The most dangerous areas shift seasonally: the southeastern U.S. coast and Mid-Atlantic during winter, Cape Cod Bay and waters south of Nantucket year-round.
For a population this small, losing even a few breeding females per year can push the species toward extinction. While the population has shown modest increases in recent years, recovery remains fragile.
Underwater Noise and Sonar
Military sonar represents another lethal, if less visible, threat. Mass strandings of beaked whales were extremely rare before the 1960s but increased sharply after navies developed mid-frequency active sonar. The connection was established definitively after stranding events in Greece in 1996 and the Bahamas in 2000, and then reinforced by a mass stranding in the Canary Islands in 2002 during a NATO exercise. Necropsies of those whales revealed widespread gas and fat bubbles in blood vessels and organs, a condition resembling decompression sickness in human divers.
The leading explanation is that sonar disrupts the whales’ normal diving behavior. Beaked whales are deep divers, and when they alter their dive patterns in response to sonar, whether by surfacing too quickly or changing depths erratically, nitrogen that would normally be managed safely can form bubbles in their tissues. The result is internal hemorrhaging and organ damage. Other proposed mechanisms include whales fleeing toward shallow water and beaching, or direct tissue damage from intense sound waves, but the behavioral disruption of diving appears to be the most supported by current evidence.
A Shrinking Demand, a Persistent Problem
The reasons humans kill whales have narrowed considerably over the past two centuries. The vast industrial demand for oil, baleen, and spermaceti is gone. The global market for whale meat is small and declining even in the countries that still permit it. What remains is a combination of political inertia, cultural identity claims, and, increasingly, the unintentional killing of whales through the ordinary activities of global shipping, commercial fishing, and military operations. For the most threatened species, these indirect causes now pose a greater extinction risk than any harpoon.