[stcredzero]

It has been argued that the raise of the Catholic Church to power had a similar reason: catholic priests don't have offspring

The opposite occurred with the Roman Legions. The Legions started out as a voluntary honor carried out by citizens -- no place for the family in that situation. Then being a Legionnaire became a career, and after awhile the rules changed so they could have families live with them. At that point, the "military industrial complex" was permanently cemented in place for that society.