Why do we humans practice monogamy ?

Outside of us humans monogamy is not very common in the rest of the animal kingdom ( very very few animals practice this ) even the earliest humans rarely practiced monogamy. But why did we grow to practice this to where its basically considered life goals to find a single person to marry and settle down with. did monogamy benefit the human race or do you think we would have been much better off without it. i know humans crave companionship but it doesn't necessarily need to be with the same person for the rest of your life, so why did it come to be?
Answers

Zirp

To conserve energy and two make our rather helpless children have more than one parent

Stylem

It didn’t come to be. “Monogamy” - ie people who marry as virgins and remain faithful til they die $nhas always been a small minority of human sexuality. In reality, the commonest pattern of human sexuality is a series of nearly-monogamous relationships with whatever else opportunity makes available. Fact.

Gray Bold

The second prediction that follows from Trivers' theory is that the fact that women invest more heavily in offspring makes them a valuable resource for males as it ensures the survival of their offspring which is the driving force of natural selection. The risks for males are higher because although women invest more in their offspring, they have bigger maternity certainty because they themselves have carried out the child. However, males can never have 100% paternal certainty and therefore risk investing resources and time in offspring that is genetically unrelated. Evolutionary psychology views jealousy as an adaptive response to this problem.

RickyRoo88

It’s just to control the population