Today’s veterans often come home to find that, although they’re willing to die for their country, they’re not sure how to live for it. It’s hard to know how to live for a country that regularly tears itself apart along every possible ethnic and demographic boundary. The income gap between rich and poor continues to widen, many people live in racially segregated communities, the elderly are mostly sequestered from public life, and rampage shootings happen so regularly that they only remain in the news cycle for a day or two. To make matters worse, politicians occasionally accuse rivals of deliberately trying to harm their own country—a charge so destructive to group unity that most past societies would probably have just punished it as a form of treason. It’s complete madness, and the veterans know this. In combat, soldiers all but ignore differences of race, religion, and politics within their platoon. It’s no wonder many of them get so depressed when they come home.
I know what coming back to America from a war zone is like because I’ve done it so many times. First there is a kind of shock at the level of comfort and affluence that we enjoy, but that is followed by the dismal realization that we live in a society that is basically at war with itself. People speak with incredible contempt about—depending on their views—the rich, the poor, the educated, the foreign-born, the president, or the entire US government. It’s a level of contempt that is usually reserved for enemies in wartime, except that now it’s applied to our fellow citizens. Unlike criticism, contempt is particularly toxic because it assumes a moral superiority in the speaker. Contempt is often directed at people who have been excluded from a group or declared unworthy of its benefits. Contempt is often used by governments to provide rhetorical cover for torture or abuse. Contempt is one of four behaviors that, statistically, can predict divorce in married couples. People who speak with contempt for one another will probably not remain united for long.
The most alarming rhetoric comes out of the dispute between liberals and conservatives, and it’s a dangerous waste of time because they’re both right. The perennial conservative concern about high taxes supporting a nonworking “underclass” has entirely legitimate roots in our evolutionary past and shouldn’t be dismissed out of hand. Early hominids lived a precarious existence where freeloaders were a direct threat to survival, and so they developed an exceedingly acute sense of whether they were being taken advantage of by members of their own group. But by the same token, one of the hallmarks of early human society was the emergence of a culture of compassion that cared for the ill, the elderly, the wounded, and the unlucky. In today’s terms, that is a common liberal concern that also has to be taken into account. Those two driving forces have coexisted for hundreds of thousands of years in human society and have been duly codified in this country as a two-party political system. The eternal argument over so-called entitlement programs—and, more broadly, over liberal and conservative thought—will never be resolved because each side represents an ancient and absolutely essential component of our evolutionary past.
So how do you unify a secure, wealthy country that has sunk into a zero-sum political game with itself? How do you make veterans feel that they are returning to a cohesive society that was worth fighting for in the first place? I put that question to Rachel Yehuda of Mount Sinai Hospital in New York City. Yehuda has seen, up close, the effect of such antisocial divisions on traumatized vets. “If you want to make a society work, then you don’t keep underscoring the places where you’re different—you underscore your shared humanity,” she told me. “I’m appalled by how much people focus on differences. Why are you focusing on how different you are from one another, and not on the things that unite us?”
The United States is so powerful that the only country capable of destroying her might be the United States herself, which means that the ultimate terrorist strategy would be to just leave the country alone. That way, America’s ugliest partisan tendencies could emerge unimpeded by the unifying effects of war. The ultimate betrayal of tribe isn’t acting competitively—that should be encouraged—but predicating your power on the excommunication of others from the group. That is exactly what politicians of both parties try to do when they spew venomous rhetoric about their rivals. That is exactly what media figures do when they go beyond criticism of their fellow citizens and openly revile them. Reviling people you share a combat outpost with is an incredibly stupid thing to do, and public figures who imagine their nation isn’t, potentially, one huge combat outpost are deluding themselves.