Polyandry, polyamory or polygyny?

If you had to choose only one of these three, which of these "lovestyles" makes the most sense from a biological perspective?polyandry - love for many men. The woman has more than one husband.
polygyny - love for many women. The man has more than one wife.
polyamory - love for many. Many loves for either gender.

By "biological" standpoint, I mean which could cause our species to evolve the best.I am agreed that polyandry is probably the least genetically successful of the three, since a woman can only have children from one male at a time. It wouldn't be of much benefit to the men, although it might be to the women if the men were wholly dedicated to her. In this sense, she can only ensure her genes survive.From a biological standpoint, though, I do have to worry about monogamy. Since our society encourages one male : one female relationships, couldn't this lead to many "bad genes" being passed on as opposed to a system where men have to compete for multiple women?If the man was capable of taking care of the women and had the resources to do so, wouldn't this be beneficial?The only downfall I can think of is the lack of genetic variety, which only monogamy provides.As for polyamory, I think most people are too jealous to do it. And if you're in it for "love", it is inevitable that if someone had to choose only one person, they would do so.Edited by xShinigamiEyesx, : No reason given.