Writing as "Zero," Bryan Johnson is an entrepreneur and explorer of the new frontiers of being human. Johnson took stock of his health and realized that a decade of chronic depression and poor cognitive control earlier in life had affected every measure of his well-being. He decided it was time to evolve. Johnson's controversial ideas and methods have attracted both detractors and devoted followers around the globe. In Zeroism, Johnson shares the philosophical principles that aim to help humanity choose a path forward into the future now.