In nature, some animals, like wolves, have an "alpha male" in their pack. The alpha male is the one who leads the pack, makes sure it's fed, etc. The thing is though, this only happens when the pack's environment changes dramatically, like if they're put in a zoo. There is a group of (human) people who don't get this though and call themselves "alpha males", i.e "manly". They usually think they're much
better than everyone else. The "hierarchy" goes like this in their head;
Alpha males (manly n' shit)
Beta males (Losers)
Now, the thing is, some "alpha males" think "wait, I'm
better than everyone, why am I sharing the top of the hierarchy with so many who also think they're
better than everyone?", and created "Sigma males", basically the same thing, but with no friends (They're "too good" for friends), so in their mind, the hierarchy goes
Sigma males (super manly n' shit)
Alpha males (manly n' shit)
Beta males (Losers)
It's just cringe