Question

According to Lamarck : changes in the environment influence changes in the use and disuse of a body part of an organ, so there are vestigal organs like appendix, etc in humans also, so is it right to think that these organs were used by earlier humans that evolved on the earth but after some time their use become less which eventually made them vestigal?

Answer 1

Vestigial structures are often homologous to structures that are functioning normally in other species. Therefore,vestigial structures can be considered evidence for evolution, the process by which beneficial heritable traits arise in populations over an extended period of time.

The presence of vestigial organs donot imply that the ancient humans had these organs, but our evolutionary ancestors had these organs.
As we know the theory of evolution never says that monkeys are our ancestors, but they suggest that we, humans and monkeys had same ancestor.
So these vertigial organs were present in our ancestors.But we humans were evolved, these organs were removed.

So the answer to your question is that, the ancient humans never had these organs,but our ancestoral species had those.

Hope this helps.
Good luck.