<P> The Peloponnesian War reshaped the ancient Greek world . On the level of international relations , Athens , the strongest city - state in Greece prior to the war 's beginning , was reduced to a state of near - complete subjection , while Sparta became established as the leading power of Greece . The economic costs of the war were felt all across Greece ; poverty became widespread in the Peloponnese , while Athens found itself completely devastated , and never regained its pre-war prosperity . The war also wrought subtler changes to Greek society ; the conflict between democratic Athens and oligarchic Sparta , each of which supported friendly political factions within other states , made civil war a common occurrence in the Greek world . </P>
<P> The Peloponnesian War reshaped the ancient Greek world . On the level of international relations , Athens , the strongest city - state in Greece prior to the war 's beginning , was reduced to a state of near - complete subjection , while Sparta became established as the leading power of Greece . The economic costs of the war were felt all across Greece ; poverty became widespread in the Peloponnese , while Athens found itself completely devastated , and never regained its pre-war prosperity . The war also wrought subtler changes to Greek society ; the conflict between democratic Athens and oligarchic Sparta , each of which supported friendly political factions within other states , made civil war a common occurrence in the Greek world . </P>
who conquered ancient greece after the peloponnesian wars
who conquered ancient greece after the peloponnesian wars
Sparta
Sparta