What were the major external causes of the development of American English?[Abstract]:America has taken up the relative top position in global military, economics and science area; this gives the American English objective effect and opportunities to be spread all over the world. As the politics, economy, culture of America being developed, the life of American people have been greatly changed, thus American English is becoming to be with more and more individualisms, in daily life and social communication, it has been accepted and used by more and more people all over the world.Keywords: American English; Origination; Development; Individualisms. 1. IntroductionBased on the lasting prosperity of American in aspects of politics, economy, and culture, together with its deep effect in international society, American English is punching the whole world with different kinds of methods. In our country, for a long time English education has been taking Britain English as the learning standard, students learn the Britain English standard pronunciation. However, in recent years, American English is affecting more and more, large quantities of files and documents from American teachers or schools have proved this. Many scientific, economical books are also written in English. To research a language, we should do know its origination, because history molds and regulates language. This thesis, tries to analyze the external reasons for American English to be developed based on the main individualisms of it.2. The main individualisms of American English2.1. The creativity of American English.American English has maintained large quantities of special language that does now not exist in Britain English. Compared to present...