The South Atlantic is presented less through a description of its shores than through the history of the whales taken from its waters. It becomes an expansive but vulnerable working sea: part of the oceanic wilderness described by Henry David Thoreau, yet also a frontier opened to increasingly efficient whaling and reshaped by war. Its most decisive recorded consequence is the loss of the South Atlantic humpback population by 1918.

An oceanic wilderness

The book sets the South Atlantic within a larger view of the sea as enduring, immense, and difficult for people to know. Henry David Thoreau’s account of the ocean as a wilderness surrounding human settlements counters the assumption that it is merely distance to be crossed. The sea’s apparent sameness conceals continual change: it can be calm or forceful, sustaining or destructive, while most of its life and activity remain beyond ordinary human sight.

That contrast gives the South Atlantic its significance in the book. It is not an empty expanse awaiting human use. Its whale populations belong to a living ocean, even as the history of their pursuit turns the region into a measure of how quickly industrial activity can transform abundance into loss.

Whaling grounds and industrial expansion

As American whaling declined, European whaling expanded into grounds that had not yet been heavily exploited. In 1904, Norwegian and British armed steamships opened Antarctic waters to large-scale whaling, establishing a new industrial phase connected to the wider South Atlantic and Southern Ocean region. Whales supplied not only traditional products but also material for nitroglycerine, joining the extraction of marine life to the expanding demands of industry and war.

The scale of this trade is also conveyed through Malcolm Clarke’s experience. In the 1950s, he joined whaling fleets operating in the South Atlantic and Southern Ocean. He recalled seeing 30,000 whales taken in a single season, with catches sometimes reaching 24 animals in a day. The figures make the industrial reach of the fleets concrete: the South Atlantic was not simply a distant hunting ground but part of a system capable of removing whales at extraordinary speed.

War and the loss of whales

The book links the expansion of whaling to the violence of the twentieth century. Whale products entered wartime manufacture, including the production of nitroglycerine, while whale oil was used to help prevent trench foot among soldiers. The South Atlantic’s humpback whales were caught up in this conjunction of extraction and war: the entire population was driven to extinction by 1918.

Wartime pressure also shifted fleets across ocean regions. From 1941 to 1943, a Norwegian flotilla operating off Peru on the Pacific coast of South America captured 8,500 sperm whales after British and Norwegian ships left the dangerous Atlantic. This was not a South Atlantic hunt, but it shows how war redirected whaling activity across the surrounding seas rather than ending it. Whaling itself virtually ceased as the Pacific became a theatre of war and many whale-catchers and factory ships were converted to military uses; after hostilities ended, demand for whale oil and meat helped bring the fleets back.

Witness and historical aftermath

Clarke’s later work studying whales’ diets offers a second perspective on the industry he had joined. He became fascinated by the contents of sperm-whale stomachs, where he found many unidentified species; one stomach contained 18,000 squid beaks. His observations register the biological complexity hidden inside an animal that the whaling system primarily treated as a catch.

The South Atlantic’s history thus holds two opposed records: whales as living animals with intricate ecological relations, and whales as industrial resources pursued across immense distances. The extinction of its humpback population supplies the starkest measure of the consequences. Clarke’s recollection of the fleets’ catches extends that history into the postwar period, making the South Atlantic a place where the scale of human extraction can be read against the lives it removed.