Explain the process by which a group may splinter into two or more groups.

1) When people first join a group, they redefine their self-concept to include other group members.
2) When there is a change in some core aspect of the group, such that the group identity has been fundamentally altered, an individual must decide whether or not she or he can accept that change.
3) If the change is unacceptable, the individual must decide whether the change is reversible or irreversible.
4) If the change is thought to be irreversible, entiativity is reduced and the group splinters (at least some individuals withdraw, and possible form a separate group).