Monogamy, by contrast, ensures that mates are available for nearly all men. ... Relative to polygyny, monogamy may also better serve the interests, reproductive and otherwise, of women. In some cases, women may be better off sharing a high-status man than they would be having a low-status man to themselves.

What is the purpose of monogamy?

Humans are now mostly monogamous, but this has been the norm for just the past 1,000 years. Scientists at University College London believe monogamy emerged so males could protect their infants from other males in ancestral groups who may kill them in order to mate with their mothers.

Why monogamy is better than polygamy?

Greater companionship, higher income, and ongoing sexual variety are often cited as advantages of polygamous relationships. Individuals who favor monogamy also tend to cite bonding, emotional intimacy, decreased worries of STDs, and other cases as reasons to opt for monogamy.