For those who do wind up divorced, there seems to be a magic number for when. No matter where in the world you’re from or in what culture you’ve been raised, you’re most likely to get a divorce…drum roll…four years into your marriage. Even more fascinating is why our human brains have evolved to hone a drive for love and partnership that lasts just long enough to raise a single child through infancy.Partnering allowed women to raise children and their male partners to provide for and protect them while the children was young. After that? We are, as mammals, driven to procreate with more than one partner in order to have the strongest genetic legacy. “If you’re having children with two or three men rather than just one, you’re creating more genetic variety in your babies. In other words, for millions of years, some primitive form of divorce was probably an adaptive mechanism to create more genetic variety Tune in!!