What is the difference between liberalism, conservatism, and radicalism? political science.

Liberalism, as the
term is generally used within political science (its common language use in the United States is
somewhat different), is a political ideology that envisions relaxed government intervention in
both the social and economic spheres. In party politics, liberal parties - such as Germany's
Free Democrats and Finland's Centre Party - often congregate within the Liberal
International.

Conservatism, as the term is generally used, is a political
ideology that envisions relaxed government intervention in the economic sphere accompanied by
proactive government support for the maintenance of certain traditional cultural values. In
party politics, conservative parties - such as the United States' Republican Party and the
United Kingdom's Conservative Party - often congregate within the International Democrat
Union.

Radicalism is an ideology that supports a fundamental restructuring of
the social and political order. Within international relations specifically, radicalism is often
used interchangeably with Marxism, though in its most general sense it can include both
left-radicalism (communism) and right-radicalism (fascism).

The differences
between these three ideological approaches is, therefore, one of constants. Liberalism and
conservatism support the basic continuity of the political and social order while radicalism
calls for its complete upending.