Why were athens and sparta evenly matched during the peloponnesian war?

Between the world wars eisenhower's presidency the 1960s what is the organizing principle of this list?

What document does the second paragraph of the declaration of independence echo

What do most climatologists see as a major cause of rising global temperatures? a. earth's closer proximity to the sun due to its gravitational pull b. greenhouse gases produced by burning fossil fuels c. rising ocean levels caused by melting polar ice sheets d. water pollution cause by industrial waste