While the `` History '' concentrates on the military aspects of the Peloponnesian War , it uses these events as a medium to suggest several other themes closely related to the war . It specifically discusses in several passages the socially and culturally degenerative effects of war on humanity itself .
The `` History '' concentrates on the military aspects of the Peloponnesian War , but it uses these events as a medium to suggest several other themes as well , for instance to show [ degenerative ] effects of war on humanity itself .