Periodization divides history into discrete, quantified named blocks of time in order to facilitate the study and analysis of history.
As of 2020, the majority of people belong to sedentary cultures. In evolutionary anthropology and archaeology, sedentism takes on a slightly different sub-meaning, often applying to the transition from nomadic society to a lifestyle that involves remaining in one place permanently.
A. John Dalton would make the following statement: "There must be a positive charge located in a tiny area at the center of an atom."
1899, the United States declared the Open Door Policy. The Americans worried that other nations would soon divide China into formal colonies and shut out the American traders. They proposed that China's doors be open to merchants of all nations.
