Most of Asia was affected by European colonialism, and Asia became very important in European nations' struggle for economic and political power. European colonialism in Asia generally faded by the 20th century, especially after World War II, but Asia has experienced political conflict as a result of its transition to independence. Population increases are a major concern for a number of Asian nations. Most people in Asia live in rural villages despite the existence of major cities in most countries and the presence of some highly urbanized countries such as Japan. Rural to urban migration is increasing, but agriculture remain crucially important.
Controversy exists over whether the Green Revolution has helped or hurt Asian farmers.