Starting in 431 BC, the ancient Greek world turned on itself as Sparta and Athens locked horns. The result of this rivalry, as is captured vividly and analysed thoroughly by historian Thucydides, was a dynamic conflict that pitted a land power against a naval power. The hostilities lasted on and off for decades, but the events fundamentally shaped the study of geopolitics. It was a war like no other. The catalyst of this conflict and steady manner in which it grew into all-out hostilities has inspired strategic concepts and thinkers throughout the ages. So, to draw parallels with the present, we must analyse Thucydides Trap’ and go over the origins of the Peloponnesian War.