Last week Pakistan claimed to have shot down two of India’s military jets and captured one pilot, increasing the friction between these two nuclear powers. In turn, India demanded the return of its pilot, confirming the loss of its MiG-21 fighter jet. The confrontation is over the disputed territory of Kashmir. Since their independence from Britain in 1947, the two nations have fought three wars, two of which were over this single piece of land. Tensions have risen over the past few years.

By the time we become adults, we have all done things we regret. Some regrets may be from childhood, with the only consequence being our embarrassment when they are humorously recounted at family gatherings. But even minor regrets may make us mentally uncomfortable when called to our remembrance. What is the purpose of regretful feelings?