A radical is a person subscribing to a political ideology supporting massive, unmeasured, and rapid change.
Radicalism is contrasted with
conservatism that advocate minimum change, reactionary action advocating counter-change, as well as
progressivism advocating moderate/measured change.
A radical would want to chang, for example, a
feudal system into a completely capitalist system, or a completely capitalist system into a communist one. Another exaple of
radicalism would be a person who wanted to change an Islamic Theocracy into an
Atheist state (see en.wikipedia.org/wiki/state_atheism)!
