What do olmec towns sculptures and others items tell us about olmec society?

Olmec towns, sculptures, and the like tell us that Olmec civilization was based on agriculture, like other early civilizations were.

Maize (corn) was a very important crop, which can be seen in many sculptures.

The Olmec had a capital city with impressive palaces, temples and monuments which give evidence that they were the first Mesoamericans to develop large religious and ceremonial centers. Some artifacts show that they were also the first to use the solar calendar. (The Maya later improved on these achievements.)