Ayn Rand, in the years of her prime, told Playboy her overarching philosophy was that “man exists for his own sake, that the pursuit of his own happiness is his highest moral purpose, that he must not sacrifice himself to others, nor sacrifice others to himself.” A recent chronicler, Mark David Henderson, said that “[s]he wanted to be known as the greatest enemy to religion that ever lived. She put together this philosophy that is all throughout her writing—from Atlas Shrugged written in 1957, which is still the bestselling novel of all time [sic].” Henderson summarized Rand's creed, which she professed and expounded in her novels and endless short writings, talks, and interviews: “She believed that the individual is the highest possible occupation of any one person. She believed that one should always occupy their minds, will, and emotions with the highest possible occupation and she believed that would be the self.”