Final answer:
Levinger saw commitment from two perspectives: in group contexts, it involves a joint commitment to a shared belief as part of group identity, and within personal relationships, it is one of the three components of love in Sternberg's Triangular Theory of Love, influencing various forms of love based on its presence or absence.
Step-by-step explanation:
Levinger conceptualized commitment primarily in terms of social psychology, particularly within the context of interpersonal relationships. Two perspectives based on his conceptualization include the commitment as part of a group belief system and the idea of commitment within relationships as described in Sternberg's Triangular Theory of Love. In group contexts, commitment does not necessarily require that all members personally hold the same belief but that they are jointly committed as part of the group identity -- exemplified by religious organizations where members might coalesce around shared beliefs despite individual differences. On the other hand, within personal relationships, Sternberg defines commitment as one of the three components of love -- alongside intimacy and passion -- that contribute to his concept of consummate love, as well as several other forms of love characterized by different combinations of these components.