Only 300 years of peace, from 3500 BC - Late 20th Century, with over 14,500 wars fought
In prehistorical post-Paleolithic societies, 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.[16] Since the rise of the state some 5,000 years ago,[17] military activity has occurred over much of the globe. The advent of gunpowder and the acceleration of technological advances led to modern warfare. According to Conway W. Henderson, "One source claims that 14,500 wars have taken place between 3500 BC and the late 20th century, costing 3.5 billion lives, leaving only 300 years of peace (Beer 1981: 20)."[18] @Curionic
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