Why did our ancesters preferred to be intelligent?

Question

i mean to say to avoid predators they became intelliegnt , they could have grown in size or else huge claws, big teeth they could evolved like that...........

Answer 1

they werent mine if youre talking apes.....HUMANS ARE THE ONLY ONES WHO READ BOOKS...

Answer 2

thats not the way evolution works, and its the beileve, we became more intelligent by facing new envirments, climate had to figure out new survival techinques, were spurred this growth in our brains,

and we have actually been growing in size, just not giant size