They actually played into the European imperialism during 19th century.These include economic , political, military, religion,and sociological motives.
Because it allowes each branch of goverment to check each others power, so no branch of government is too powerful/ each branch is balenced.
The answer is atomic number
Lyndon Baines Johnson, gave top priority to the passage of the bill. ... The bill also authorized the US Office of Education to distribute financial aid .... voting rights bill to Congress, and he urged Congress to vote the bill into law.