Immigration movement to North America

(1)① It is the development of capitalism on a large scale; ② It is the plunder of Indians; ③ It is the great migration of ordinary people in the east; ④ It has promoted the economic development of the western region and the United States, especially the industrial revolution.

(2) the western region has been developed and agriculture has been mechanized; A new industrial zone has formed in the west; Build five transcontinental railway trunk lines; The United States completed the industrial revolution before France and Germany and became an industrial power second only to Britain.

(3) The westward movement is not only the slaughter, expulsion and plunder of Indians, but also the driving force to accelerate the economic development of the United States. The latter is dominant.