How did Cavemen think?

i speculate we still thought the same way as cavemen but more primitive. if you read in Sophies world or maybe it was the book zero. the way numbers were developed was primitive. to cavemen theres no 1-infinity theres only 1 and anything more then 1 is many. as time goes on there would be more numbers 1-2 then many and so on. so its likely the same way just far more primitive.