Activism, in a general sense, can be described as involvement in action to bring about change, be it social, political, environmental, or other change. This action is in support of or opposition to one side of a controversial argument.
There are many different forms of activism; a select list follows.
... by the Brethren of the Common Life[?].
He became skilful as a copyist and was thus
enabled to support himself. Later he was admitted
to the Augustinia ...