Killing human beings is the world’s biggest problem. Its cause is unhappiness. Everyone wants to be happy. Because they are unhappy, people kill other people. Unhappiness assumes many forms—dissatisfaction, annoyance, frustration, fear, anxiety, stress, discontent, depression, despair, desire, envy, resentment, anger, hatred, even boredom and indifference. Unhappy people determine a cause of their unhappiness—not enough money, not enough security, not enough time, not enough space, not enough rest, not enough love. Unhappy people fix blame. The cause of my unhappiness, they think, is my wife, my kids, my dad, my neighbor, my boss, the whites, the blacks, the immigrants, the aliens, the unbelievers, the religious fanatics, the criminals, the lawyers, the Russians, the Americans, the lazy people, the smug people, the evil people, the assholes—the people we’d all be better off without. If she were dead, unhappy people think, I’d be happy. If he were dead, I’d be happy. If they were dead, I’d be happy. If they were all dead, unhappy people think, we’d all be better off. The solution to the world’s biggest problem is to stop thinking this way. Killing is not a solution.