I didn't exactly remember the quote, but there are another 'biological' prove of this concept - in case 'one man, hundred women' there are guaranteed survival f

I didn't exactly remember the quote, but there are another 'biological' prove of this concept - in case 'one man, hundred women' there are guaranteed survival for entire specie, while 'hundred men, one woman' is a lose case. In simple words, men are consumables, and this fact is known for ages. Especially in poor countries.