Civil War Definition
A civil war is defined as an armed conflict, often protracted, where politically organised groups within a state contest for political control of that state, or strive for the establishment of all or part of the state in a new form.
Historical Significance
Major civil wars frequently represent highly significant watersheds in the trajectory of a nation-state or society. Examples include the English Civil War (1642–1648), which signalled the decline of absolutism, and the American Civil War (1861–1865) and the Spanish Civil War (1936–1939).
Socio-Economic Implications
These conflicts can illuminate broader societal shifts. For instance, the American Civil War is sometimes viewed as confirming the supremacy of capitalism across North America, stemming from the victory of the industrial North over the slave-owning Southern states, as suggested by Barrington Moore (1967).
Conceptual Overlap
Because civil wars often involve revolutionary change and armed struggle, there is frequently difficulty in distinguishing between a civil war, rebellion, or revolution. For example, the protracted internal conflicts preceding the success of the Russian Revolution illustrate this complexity.

