Izuku grew up in the cave man era, being smarter and different he stayed away. He didn't stay too close but didn't stay too fat ether. He made his own shelter near the forest but when they started learning, he traveled. Through the years he met different tribes, learned their survival and medical Technics. He learned many things over his years of traveling, he even learned assassination in the 1066 era or most known as the medieval era, after three years living their he learned of something called cultivation.