As a further protection, the personnel of each branch are selected by different constituencies and procedures for different terms of office. The separation of powers principle contrasts with British-style parliamentary government, where almost all political power rests with the legislative branch. The principle of judicial review is an important part of the checks and balances of the American system, although other governments with separated powers do not include it. One criticism of separated powers is that it can also result in weak government, especially if the legislative and executive branches are controlled by different political parties.
Bibliography: Fischer, L., Constitutional Conflicts between Congress and the President, 3d ed. (1991); Gwyn, W. B., The Meaning of the Separation of Powers (1965); Knight, B. B., ed., Separation of Powers in the American Political System (1989); Saye, A. B., and Allums, J. F., Principles of American Government, 11th ed. (1990).