Joe Haldeman’s The Forever War is a timely novel of remarkable depth, despite its brevity. Its premise is simple: humanity discovers interstellar travel by speeding toward collapsed stars, seemingly covering light-years in moments, though actually with extreme time dilation. War soon breaks out with the Taurans, a strange alien race from near Aldebaran that supposedly attacked human ships.

William Mandella, a physics student, is conscripted for an elite United Nations task force to fight the Taurans. After returning from what was for him a two-year expedition, he finds that 26 years have passed on Earth. Extensive class wars have led to the abolition of most private property, most are unemployed and living on government income, hunger has been eradicated through technological developments, and many nations encourage homosexuality to control population size and prevent more class conflict. Mandella and his occasional lover Marygay grow closer, sharing a feeling of alienation in a changed world, and eventually reenlist with the promise of a safe posting on Luna. When they quickly receive updated orders to return to combat, Mandella laments that he does not know which is worse: the feeling that this was bound to happen, or that he was returning to the only place he can call home.

After another tour, Mandella is separated from Marygay, so with time dilation they will likely never see each other again. Mandella throws himself into his military service, the only life he knows now, but he is too different from those under his command, who are all homosexual, ethnically identical, and speak a new form of English. He does not hate these soldiers; in fact, he knows that he is the real “other,” so out of time that he cannot rightfully judge them. Mandella returns from his final tour to learn that his arrival marks the end of the “Forever War.” Mankind had become a fully cloned species that could communicate with the similarly collective Taurans, whose first utterance was a somber “Why?” The Taurans had not initiated the war. Generals had blamed the accidental disappearance of human ships on the aliens to create a war, in order to spur a weak economy. Catharsis does come for Mandella, however, as he eventually reunites with Marygay, who dramatically slowed her aging by continuously jumping between collapsed stars until he returned. But many soldiers do not enjoy such a happy ending to their struggle.

Many view The Forever War as a foil to Robert Heinlein’s Starship Troopers, rejecting its glorification of war. But ultimately, it is an expression of Haldeman’s experience fighting in the Vietnam War, which shares obvious similarities with the novel’s conflict. Both wars started with spurious ideological justifications and economic greed. Both dragged on for many years with no real goal beyond attrition. Both ended with no meaningful change other than lives lost. Both destroyed the lives of many veterans while alienating them from normal society. These forever wars are most damaging because they persist without any conception of what victory looks like. An oft-parroted and more often mocked phrase from American generals in the late 1960s was that they could see a “light at the end of the tunnel,” satisfactory exit from Vietnam. But America did not fully exit the country until 1975.

Much of the same can be said about American involvement in Afghanistan. After our twenty years of fighting and attempting to build a stable government and capable army, Kabul fell in less than ten days amid an embarrassingly haphazard American exit. And the persistent ineptitude of the Afghan army, from general incompetence to its notorious failure to address child sexual abuse, signifies both a lack of good management and a deep cultural divide that ridiculous amounts of time and resources could never bridge. Did anything substantively change over the course of this conflict, or was it another forever war? This seems to be a story that repeats itself. I was eleven months old when America entered Afghanistan; the conflict lasted almost until my graduation from college. I knew people who were born and passed away in that same period.

An Afghanistan veteran once joked with me that “we fought to protect poppy fields, and we came home and became addicted to prescription opioids.” War always profoundly affects the individuals involved. Haldeman’s story is most valuable as a reflection on this tragic human element. There is usually no happy ending for those veterans who return home battered and broken. Society often rejects them, or has become unrecognizable to them. America should not allow wars to drag on forever due to moneyed interests or vapid ideology. And for the veterans, who have given their all for these protracted conflicts, the least we can do is be compassionate.