Albeit this is a basic answer, World War Two was a major catalyst to an increased focus on internationalism. In addition, financial and political interests (most notably for political interests is the Cold War) are both legitimate reasons to why the United States of America has remained as a major part of international affairs.
The printing press invented the future, it was the inspiration for devices like the type writer and the key board. Plus the printing press is the reason the production of the bible had a mass spike in production, thus also shaping the future.
I hope this helps.
Ferguson. Brown II, issued in 1955, decreed that the dismantling of separate school systems for Black and white students could proceed with "all deliberate speed," a phrase that pleased neither supporters or opponents of integration.