When and why did the practice/institution of and desire for marriage to a single spouse for life become common? Most animals take many mates over their lifetimes, when and why did humans begin the idea of marriage?

by rpbrady713
Wrongtickets

https://www.reddit.com/r/AskHistorians/comments/6npbvo/what_would_marriage_be_like_in_ancient_egypt/dkbirvb

Great comment from /u/cleopatra_philopater about marriage in ancient Egypt that could interest you.