During the 1960s and 1970s, the images of two men came to dominate the iconography of left-wing movements: Fidel Castro and Che Guevara. The story of the revolution these two men led in Cuba became a fable that drove and encouraged other revolutionary movements around the world. The Cuban Revolution is certainly astonishing. Beginning with fewer than 100 armed men, the Fidelistas took on a government that had a well-equipped army, air force, and navy. On paper, the handful of rebels stood no chance.

London was a tinderbox waiting to ignite. An unusually hot and dry summer had drained the city’s water supplies, and without an organized firefighting force, its citizens were left to fend for themselves. The stage was set for catastrophe, and in the early hours of Sunday, September 2, 1666, the spark was struck. A seemingly inconsequential fire ignited in a baker’s shop on Pudding Lane. Unchecked and underestimated, it would grow to become one of the most devastating disasters London had ever faced.

Margaret Thatcher, famously known as the “Iron Lady” due to her tough-as-nails personality, was not only Britain’s first female prime minister, but one of the most influential political leaders of the 20th century. She commanded the spotlight at a crucial moment in both British and world history. Although she had her problems along the way—dealing with the Cold War, incursions at the Falkland Islands, and attacks by the IRA, at one point almost losing her life in the process—she rose to the occasion.

What would become the nation of Yugoslavia was created in the turbulent period following the end of World War I in 1918, but ended 74 years later in the chaos of another war. In its relatively brief history, Yugoslavia endured invasion during World War II and a range of styles of leadership that included an autocratic king, an even more autocratic socialist dictator, as well as brief periods of parliamentary democracy.

Robert Oppenheimer had a lot resting on his shoulders. During the Second World War, he was tasked with directing the development of the world’s first nuclear arsenal. Known as the Manhattan Project, this super-secretive wartime project had the stoic visage of Oppenheimer overseeing the greatest experiment ever conducted by humankind. Much had happened in Oppenheimer’s life to lead him to this point, and much would subsequently take place after, but this moment was indeed the pinnacle of his career and his life.