I think its mathematics,i could be wrong but i would mathematics
The economic wealth of Calicut, Mogadishu, and <span>Venice in the 13th century was primarily dependent on their fertile soil, but of course there were other factors as well. </span>
They hunted and gathered their food. The nomads moved place to place and the Neolithic age they began to develop agriculture and herd their food
Education allows people to form their own ideas.
