Key element is probably less technology, and more social/political/religious unity. You need a stable and egalitarian social fabric to make consistent progress.

Key element is probably less technology, and more social/political/religious unity. You need a stable and egalitarian social fabric to make consistent progress. Core beliefs: rebooting civilization is hard but will make everything better (promised land), here's the scientific method and why it works, here's how to setup and maintain a democratic nation state, here's how to incentivize and reward inventors. Here's fascism and why it's bad. Here's the Prisoner's Dilemma -- everyone must cooperate with each other and identify and punish defectors. Here's songs and rituals and art you can participate in together to reinforce all of this.