It’s just biology. In a man’s mind, deep down, in the most primal parts of him, every other man is his competition. There is one spot at the top, and every man must compete for it. Your best friend is your competitor. Your dad is your competitor. Your son is your competitor. Even though this is highly illogical in the actual context of reality, our basest feelings trend towards this. Obviously one man cannot fuck 8bil women. Obviously you want your son to succeed and excel over you. Obviously your father is an old man who is not in competition with you. But your monkey brain feels otherwise.
To add onto this, one man can impregnate virtually limitless women. One woman can only be pregnant once a year (once every 2-3 years is recommended). Sperm is not a scarce resource. Wombs and eggs are.
In many mammals, less than half of men will reproduce in the wild. Life is a zero-sum game for males, or at least, it appears that way to your monkey brain. If a man is improving in life, it feels as if your life is getting worse (it isn’t).
But we’re advanced humans with big monkey brains, so we recognize we need male labor to support advanced society. So we pretend to value and respect the lives of lesser men to keep the gears turning, even though it makes our monkey brains very mad to see other men happy with beautiful wives and families, even if we have even more than they do.
The mask is slipping. We’re devolving. Men are being isolated because they can’t overcome their monkey brains that make them hate other men. Men have a much lower rate of in-group bias than women do. Women see each other as allies, men see each other as competition.
Where do women fit in all of this? Easy. They let men duke it out. They encourage the monkey mating rituals. When the dust has settled, the best monkey is ontop the hill, and all the women fight for the top monkey.
Humans are too smart for their own good, but also not smart enough. The average IQ in the world needs to be like 130 to make a utopia. Humans will never get there. We’re just really smart monkeys who aren’t smart enough to fix their own problems.