Now while I don't study it like you apparently do and I don't typically consider wikipedia a valid source, I find it hard to believe that we were meant to be monogamous when no one/few people in human history were until 20,000 years ago when agriculture was invented, and most societies aren't monogamous.Stuff....
At any rate I thought that this was an interesting set of articles.Although, scientists discuss the evolution of monogamy in humans as if it is the prevailing mating strategy among Homo sapiens, only approximately 17.8% (100) of 563 societies sampled in Murdock's Atlas of World Cultures has any form of monogamy (although these account for much larger than 17.8% of the World population). Therefore, "genetic monogamy appears to be extremely rare in humans," and "social monogamy is not common, . often reduc[ing] to serial polygyny in a biological sense". This means that monogamy is not now and probably never was the predominant mating system among the hominid lineage.
http://www.psychologytoday.com/blog/...y-polygamous-0
http://www.psychologytoday.com/blog/...gamy-is-normal
http://www.psychologytoday.com/blog/...enefit-women-0
It also points out that from an evolutionary perspective that polygyny is a superior option for women as they gain access to better genetics that way which is something that I had never considered prior to reading that article.