Why did hunter-gatherers live in small groups instead of larger ones?

Because they moved around alot and there were many groups who had large territories.

Answer meranesia;

The zhou dynasty (1046-256 bce) was the longest-lasting of china's dynasties. it followed the shang dynasty (c. 1600-1046 bce) and it finished when the army of the state of qin captured the city of chengzhou in 256 bce.