This is not to deny that there have been plenty of wicked kings in the past 2,500 years. Most likely they were in the majority. Nevertheless, the new trend was that rulers were at least supposed to be good. And many did try to govern in ways that benefited the common people, not just the ruling class. This remarkable turnaround happened virtually simultaneously in the Mediterranean, the Near East, India, and China. Why? The answer, simply put, is religion. Well, religion plus lots of war. This combination of factors isn't usually considered very congenial to human flourishing.