Most people in the crowd had no idea what Mr. Castro planned for Cuba. A master of image and myth, Mr. Castro believed himself to be the messiah of his fatherland, an indispensable force with authority from on high to control Cuba and its people.

He wielded power like a tyrant, controlling every aspect of the island’s existence. He was Cuba’s “Máximo Lider.” From atop a Cuban Army tank, he directed his country’s defense at the Bay of Pigs. Countless details fell to him, from selecting the color of uniforms that Cuban soldiers wore in Angola to overseeing a program to produce a superbreed of milk cows. He personally set the goals for sugar harvests. He personally sent countless men to prison.

But it was more than repression and fear that kept him and his totalitarian government in power for so long. He had both admirers and detractors in Cuba and around the world. Some saw him as a ruthless despot who trampled rights and freedoms; many others hailed him as the crowds did that first night, as a revolutionary hero for the ages.