War Drawing

Before the dawn of history war likely consisted of small-scale raiding. One half of the people found in a Nubian cemetery dating to as early as 12,000 years ago had died of violence. Since the rise of the state some 5,000 years ago, military activity has occurred over much of the globe. The advent of gunpowder and the acceleration of technological advances led to modern warfare. In the European medieval period, war was considered part of the set of seven mechanical arts.
In War Before Civilization, Lawrence H. Keeley, a professor at the University of Illinois, says that approximately 90–95% of known societies throughout history engaged in at least occasional warfare, and many fought constantly. Despite the undeniable carnage and effectiveness of modern warfare, the evidence shows that tribal warfare is on average 20 times more deadly than 20th century warfare. At one battle lost in 1857 among the Mohave-Yumas, 49.6% of combatants were killed; in a great Aztec battle fought in 1478, 87.1% of 24,000 combatants were killed, while 100% of combatants were killed during the Blackfoot Indian raid which annihilated the Assiniboins in 1849.
The Human Security Report 2005 documented a significant decline in the number and severity of armed conflicts since the end of the Cold War in the early 1990s. However, the evidence examined in the 2008 edition of the Center for International Development and Conflict Management's "Peace and Conflict" study indicated that the overall decline in conflicts had stalled.