Overpopulation. that is a great characterization for this.
A lack of democratic government, national borders, conflict between tribes in neighboring states, natural resources being owned by other national governments, desertification.
Rationalism is the view that reason is the chief source and test of knowledge, it is a methodology in which the criterion of the truth is not sensory but intellectual and deductive. During the scientific revolution, changing perceptions about the role of the scientist in respect to nature, the value of evidence, experimental or observed, led towards a scientific methodology in which rationalism<span> played a large, but not absolute, role.</span>
Whatever its origins, American imperialism experienced its pinnacle from the late 1800s through the years following World War II. During this “Age of Imperialism,” the United States exerted political, social, and economic control over countries such as the Philippines, Cuba, Germany, Austria, Korea, and Japan.