Up to a degree.

You would need a group of alpha males to guarantee genetic diversity for future generations, or your little society will start having issues with inbreeding and maybe get killed by a rival tribe.

It's hard to say whether that would yield better results over monogamy after several generations. I wonder if this is an experiment evolution already tried over million of years or if it's a novel approach. Prehistoric men being of similar strength and not having tools would make it hard for an elite to get all women without rebellion. Nowadays, with a population which is mostly unarmed, it would be easier.