[AhrowTway]

- Initial kings collect women like Pokemon.

- No contraception. Much baby.

- Many claims to throne in 14-18 years.

- Claimants go to war with one another. Soldiers are invented, voluntary and noble at first. Religious later. Can't do mass conscription from the common man as he's working the essential farms.

- Losers happen. Slavery is invented.

- Slaves work the mines and other harsh labor, which allows for post-agrarian activities and advanced economies.

- King sits back and lets the the whole clusterfuck evolve in his favor.

A auto-catalytic male shortage. Easy peasy.

Inadvertently, I have just Twitterized the Old Testament.