How did the primitive people live?

the same way that 'late' (modern day) people do. eat, sleep, drink and communicate. homosapians such as cave men do exactly the same things as we do today. they just did it in a different way. for example, we have jobs to get paid, which allows us to eat and keep up to date as far as technology is concerned. however cave men, used weapons and tools to hunt which allowed them to eat.