On the political front, Americans sought to expand their role in world affairs. World War 1 also led to the rise of the “Lost Generation.” This was a generation that had become disillusioned with the ideals and values of American consumer culture and political democracy.
It taxed the crud out of people, while instilling fear in them.
This made it wealthy and influential.
It was predicted that James Earl Ray killed Martin Luther King Jr. due to his persuading speech. He was worried that if his speech touched many people's hearts and persuaded them against slavery, then slavery would end, but he WANTED to keep having slavery! So, before Martin's speech got slavery to end, he had to end Martin's mouth by taking away his life.
I hope this helps! :-)