What is theory of man?

Answer 1

Humans are primates. Apes, monkeys, chimpanzees, etc. are also primates.

Skeletons of primates that lived millions of years ago show that the ancestors of humans have changed from rather short hunched and probably furry primates that lived in groups and used stone tools to Homo erectus to the modern human.

The theory is that all primates probably had a common ancestor but due to separation of groups, environmental factors and random genetic mutations, speciation occurred and different groups of primates became increasingly different from each other. Modern primates do not look like their distant ancestors after millions of years and each species of modern primates are different from each other. The great ape is different from lemurs and humans. Humans are unique in having the ability to excavate, document and study the remains of organisms that lived millions of years ago.

Just as birds had a common ancestor with dinosaurs as did, perhaps reptiles, humans had a common ancestor with other mammals.