John Feffer writes at Foreign Policy in Focus:
Video games usually provide you with multiple lives. If you step on a landmine or get hit by an assassin, you get another chance. Even if such virtual reincarnation is not built into the rules of the game, you can always reboot and start over again. You can try again hundreds of times until you get it right. This formula applies to first-person shooter games as well as simulation exercises like SimEarth.
The real Earth offers a similar kind of reboot. Catastrophe has hit our planet at least five times, as Elizabeth Kolbert explains in her new book, The Sixth Extinction. During each of these preceding wipeouts, the planet recovered, though many of the life forms residing in the seas or on land were not so fortunate (“many” is actually an understatement—more than 99 percent of all species died out in these cataclysms).