Answer: civilization has changed dramatically over time. Mankind started out as Cro-Magnons which are our modern human ancestors. In the Paleolithic era, hunting, fishing, and gathering were primary food sources. Early human diets were dependant on natural ecosystems. Civilization then learned how to farm and domestic animals whish was the most significant thing that happened in the new stone age.
Step-by-step explanation:
You may continue research or keep building on what I gave you, cheers!