Greece is very hilly so it was hard for the ancients greeks to farm the land and use crops as a main source of food so instead they use sea food as a main source of food since they are sorounded by the ocean.
Answer:
It was caused by a decreasing death rate.
Explanation:
I mean, that's kind of the only way lol
Provided land as long as worked the land 10 years or so and then the land is yours