Twenty years ago, Stephen Hawking tried to explain time by understanding the Big Bang. Now, Sean Carroll says we need to be more ambitious. One of the leading theoretical physicists of his generation, Carroll delivers a dazzling and paradigm-shifting theory that illustrates how the arrow of time owes its existence to conditions before the Big Bang itself—an era Einstein never dreamed of—and that our universe is part of a family in which many of our sibling universes experience time in the opposite direction. Embracing subjects from entropy to quantum mechanics to time travel to information theory and the meaning of life, “From Eternity to Here” is no less than the next step toward understanding how we came to exist.