What was early man food?

Answer 1

There are different kinds of "early man." Neanderthals ate mostly meat, just as Inuit do today, since few human-nutrient vegetables grow in the shadow of glaciers. Globe-trotting Erectus ate wild grass seeds, fruits and the occasional critter. Some may have eaten their fellows (we surmise this from enlargements in the foranem magnum, the spine-hole in the base of the brain; figuring that some cannibal did that to scoop out the brain / a big animal would just have crushed the whole skull).

Those who lived in the refugees during the Great African Drought added fish and shellfish to their diet, and some anthropologists suspect this new source of protein might have played an important role in brain enlargement.

Somewhat later, but still "early" man, developed agriculture and switched to a diet heavy in grains. There were two effects of this: a great increase in population since food was reliable, and a shortening of individual lifespan still the monoculture diet lacked a full range of nutrients.

Answer 2

Fruits, root and raw meat