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.
... sub-branch of Indo-Iranian[?]. Vedic Sanskrit and Avestan are the oldest members of the Indo-Iranian sub-branch of the Indo-European[?] family. Nursitani languages, ...