Which two events contributed to the spread of ancient greek culture and literature? - selection of athens as the greek capital - founding of democratic principles - greece’s defeat by the macedonians - the launch of the olympic games - publication of homer’s epic poems there is two answers.

The first answer is the founding of democratic principles, the system of  government by the majority of people, for the people by the people. This is the system that rules most of the western world.

The second answer is the Macedonian's victory over Greece. Alexander the Great was Macedonian, not Greek, but with all the territory he conquered, He spread Greek culture.