The spread of Islam changed many countries. The religion quickly spread and many countries of power classified themselves as Muslim countries. This united the countries in a religious manner and all of the Muslim countries were led and ruled by a khalifah. The united rule helped Muslims achieve victory over battles that would change the face of the Earth.
<em>that states failed to provide equal education opportunities</em>
It changed during World War 2 II. December 7, 1941, was a traumatic event in World history. The Japanese attacked the Americans at Pearl Harbor. Then Hitler declared war on the U.S. In 1945, the U.S. claims a world's primacy as the world's superpower by dropping two nuclear bombs on Japan and the Nuclear Age began.
I would say the answer is the 335 Years War.