First, what it really measures is not the rate of monogamy (as in being with one partner at a time), but the rate at which animals only mate with one other animal throughout life, without contraception (which humans have).
Second, I wonder how culture shapes the score for humans. A lot of monogamous behavior in humans is shaped not by natural drive to stick to one partner, but by culturally defined repercussions for going out with someone else.
First, what it really measures is not the rate of monogamy (as in being with one partner at a time), but the rate at which animals only mate with one other animal throughout life, without contraception (which humans have).
Second, I wonder how culture shapes the score for humans. A lot of monogamous behavior in humans is shaped not by natural drive to stick to one partner, but by culturally defined repercussions for going out with someone else.