Discussion, interaction, and experience within a radical group can result in an aggregate increase in commitment to the cause, and in some cases can contribute to the formation of divergent conceptions of the group's purpose and preferred tactics. Within a radical group, internal dynamics can contribute to the formation of different factions as a result of internal disillusionment (or, conversely, ambitions) with the group's activities as a whole, especially when it comes to a choice between violent terrorism and nonviolent activism. The Weather Underground’s split with Students for a Democratic Society is one of many examples. The dynamics of group polarization imply that members of this larger group must either commit to one faction and demonstrate their loyalty through further radicalization, or leave the group entirely.