Throughout human history, there have been countless conflicts ranging from small-scale disputes and tribal conflicts to regional and global wars. It is impossible to determine an exact number as many conflicts often overlap or are unrecorded. Some notable conflicts include the two World Wars, the Crusades, and the numerous civil and revolutionary wars that have shaped the course of human history. Unfortunately, conflict remains a constant aspect of human society due to various factors such as politics, economics, religion, and cultural differences.