Mi big list would include more items, such as (but not limited to):

Domestication of fire (it should be on the flag of the future One World State)

Domestication of food (i.e. agriculture/cattle raising), from which comes the next item:

Cities (terribly underrated)

Writing (this alone increased a thousandfold the pace of cultural evolution as compared to Neolithic times; only the Internet starts to barely compare)

Legal systems/human rights (a.k.a. what prevents you from smashing your neighbor's head to take his wife)

Contraception (especially the pill)