What did they do before irrigation system was a thing

The crops needed water to grow. These early people invented a system of canals that they dug to irrigate their crops. They also built gates into these canals so that they could control the flow of water. They built reservoirs to hold water supplies in case of drought.

i confess that there are several parts of this constitution which i do not at present approve, but i am not sure i shall never approve them: for having lived long, i have experienced many instances of being obliged by better information or fuller consideration, to change opinions even on important subjects, which i once thought right, but found to be otherwise. it is therefore that the older i grow, the more apt i am to doubt my own judgment, and to pay more respect to the judgment of others.

explanation:

i have ni idea