Main features of historical approach. It is also known as the theory of demographic Transition. This theory gives socio-demographic changes passing through three well defined stages of transition from ancient to medieval to the modern stage. These three stages indicate an evolutionary sequence of changes from simple to complex and from a high to low fertility-mortality rates.
Main features of this theory are as under:
(i) It signifies a clear sequence of evolutionary socio-economic and demographic changes.
(ii) The changes follow an identical pattern of change from simple to complex and from high to low fertility rate.