There had been both emotional and physical excesses. Rodger, noted for his pictures of the Blitz and the liberation of Bergen-Belsen, had had to walk "three hundred miles through the bamboo forest and what seemed like a thousand mountain ranges" to escape the Japanese in Burma. He would give up war photography forever after finding himself "getting the dead into nice photographic compositions" upon entering the concentration camp. Cartier-Bresson spent much of the war as a German prisoner and, after escaping on his third try, in the French Resistance. Polish-born David Seymour (known as "Chim"), who received a medal for his work in American intelligence, had lost his parents to the Nazis (his father was a publisher of Hebrew and Yiddish books). And Hungarian Capa, whose name was synonymous with war photography since the Spanish Civil War, made the blurred, visceral photographs of the D-Day invasion that became its symbols. Tragically, two of the four founders - Capa and Chim - would die within a decade covering other wars.
These four formed Magnum to allow them and the fine photographers who would follow the ability to work outside the formulas of magazine journalism. The agency, initially based in Paris and New York and more recently adding offices in London and Tokyo, departed from conventional practice in two fairly radical ways. It was founded as a co-operative in which the staff, including co-founders Maria Eisner and Rita Vandivert, would support rather than direct the photographers. Copyright would be held by the authors of the imagery, not by the magazines that published the work. This meant that a photographer could decide to cover a famine somewhere, publish the pictures in "Life" magazine, and the agency could then sell the photographs to magazines in other countries, such as Paris Match and Picture Post, giving the photographers the means to work on projects that particularly inspired them even without an assignment.
In those days a photographer had a significant advantage: large areas of the world had hardly ever seen a photographer. They could choose to go almost anywhere they wanted, as Rodger pointed out, because in the early days one could "take pictures of just about anything and magazines were clamoring for it; the mistake was in thinking that it would continue." Still, four decades later, at the age of 75, Rodger was averaging one sale a month of the photographs he had taken in Africa in the late 1940s during a self-initiated post-war trip that he had undertaken "to get away where the world was clean."
Magnum's first move was to divide the world, rather loosely, into flexible areas of coverage, with Chim in Europe, Cartier-Bresson in India and the Far East, Rodger in Africa, and Capa at large and replacing Bill Vandivert (an American who had helped found Magnum but soon dropped out) in the USA. They had some early scoops, such as Robert Capa's first uncensored look behind the Iron Curtain at the Soviet Union with the writer John Steinbeck, [originally published in "Ladies Home Journal" (for which Capa, according to John Morris, the Journal's picture editor and later Magnum's executive editor, was paid $20,000 to Steinbeck's $3,000)], and Cartier-Bresson's landmark coverage of India at the time of Gandhi's assassination.
It was important for Magnum's photographers to have this flexibility to choose many of their own stories and to work for long periods of time on them. None of them wanted to suffer the dictates of a single publication and its editorial staff. They believed that photographers had to have a point of view in their imagery that transcended any formulaic recording of contemporary events.