A philosopher argues that taking love-altering substances might not just be a good idea, but a moral obligation
George Bernard Shaw once satirized marriage as "two people under the influence of the most violent, most insane, most delusive, and most transient of passions, who are required to swear that they will remain in that excited, abnormal, and exhausting condition continuously until death do them part."Yikes. And yet, nearly all human cultures value some version of marriage, as a nurturing emotional foundation for children, but also because marriage can give life an extra dimension of meaning. But marriage is hard, for biochemical reasons that may be beyond our control. What if we could take drugs to get better at love? Perhaps we could design "love drugs," pharmaceutical cocktails that could boost affection between partners, whisking them back to the exquisite set of pleasures that colored their first years together. The ability to do this kind of fine-tuned emotional engineering is beyond the power of current science, but there is a growing field of research devoted to it. Some have even suggested developing "anti-love drugs" that could dissolve abusive relationships, or reduce someone's attachment to a charismatic cult leader. Others just want a pill to ease the pain of a wrenching breakup. Evolutionary biologists tell us that we owe the singular bundle of feelings we call "love" to natural selection. As human brains grew larger and larger, the story goes, children needed more and more time to develop into adults that could fend for themselves. A child with two parents around was privy to extra resources and protection, and thus stood a better chance of reaching maturity. The longer parents' chemical reward systems kept them in love, the more children they could shepherd to reproductive age. That's why the neural structures that form love bonds between couples were so strongly selected for. It's also why our relationships seem to come equipped with a set of invisible biochemical handrails: they're meant to support us through the inevitable trials that attend the creation of viable offspring.