What you are describing is a relatively recent impulse because our society has only existed in such a way as to require that for the past 10,000 years (with the advent of patriarchy). Up until that time, women didn’t need a “provider” because the entire tribe shared food and women contributed 50–60% of that. “It is in our genes. Just like the fact that women are wired to seek out a mate who they can have children with and provide the greatest security (i.e. physical, financial, etc.) for their family.” — this is just a cultural myth, it’s not scientific in the least for the bulk of human history.
“Partible paternity, where a woman mates with several men, who are then all considered partial fathers of the offspring, still takes place in lowland South America. “Among the Bari of Venezuela, many women, but not all, take lovers during their pregnancy. They later identify these men as secondary fathers of their children. In this case, “possession of a secondary father was associated with a heightened probability that a pregnancy would eventually produce an adult Bari individual,”(6)”
