He wanted himself to change as much as he wanted others to change as well, but he saw that it was a very difficult task to change oneself, and by seeing that, he understood the challenges he would face when changing the people.
The Rwandan Civil War was between the Hutu's and the Tutsi's.
The Hutu's made up a large majority of the population. However, a Hutu Manifesto published in the middle of the 20th century claimed that the minority group of the country (the Tutsis) were manipulating and controlling the government. Essentially, they were blaming the Tutsi for the problems in Rwanda. This helped lead to the Rwandan Civil War and the Rwandan genocide.
New inventons that changed American society during the late 1800's are steam power and electricity. The railroad helped expand the U.S.. The telegraph, the telephone, and the typewriter brought people together that were far away.