The advancement of the intellectual powers through natural selection Importance of imitation Social and moral faculties Their development within the limits of the same tribeNatural selection as affecting civilised nationsEvidence that civilised nations were once barbarous

What is the correctly punctuated version of this sentence?
The advancement of the intellectual powers through natural selection Importance of imitation Social and moral faculties Their development within the limits of the same tribeNatural selection as affecting civilised nationsEvidence that civilised nations were once barbarous.