All men are not created equal. Some are smarter, some are larger, some are stronger, etc. This idea that all men are fit to breed is an ahistorical meme.

Not only that, but it is well established that filtering for sexual characteristics highly correlates with other beneficial attributes for the species down the line. There is no case in nature where the females choosing to breed with the largest, most dominant or most elaborately decorated male have impacted their species negatively. This can be seen easily in the elaborate mating habits of birds, herd mammals, even apex predators such as lions and gorillas. By monopolizing access to multiple females, dominant males can maximize their reproductive output, siring numerous offspring within a single breeding season. This strategy is particularly advantageous in environments where resources are abundant enough to support multiple offspring and where competition for mates is fierce.

Furthermore, harem systems can lead to the evolution of elaborate secondary sexual traits and behaviors in males. In many species with harem structures, males develop striking physical characteristics, such as elaborate plumage, antlers, or sizeable body mass, which serve as signals of dominance and attractiveness to females. These traits often undergo sexual selection, where females preferentially choose to mate with males exhibiting the most exaggerated traits, thereby driving the evolution of more pronounced features over successive generations. Therefore, the growth of masculinity in the tangible sense is clearly owed to the hypergamic tendencies of females.

It is well established that equality is a delusional desire. No one seriously thinks all men should have the same amount of money, luxury, power or prestige. Even the idea of balancing these various attributes is mocked and not even practiced in socialist societies.

Why then does the idea of monogamy continue to persist? Men are not equal. Why should their mating potential be?