Although this thinking is often popularly described as a "theory", according to scientific method it is not yet at that stage of proof, because the fossil and archeological records merely leave open the possibility rather than establishing a testable prediction.
Although this thinking is often popularly described as a "theory", because the fossil and archeological records merely leave open the possibility rather than establishing a testable prediction. It is not yet theory at that stage of proof. This is according to scientific method.