While the epistemology and ontology of Western-centric International Relations (IR) claim to be universal in nature, they are culturally confined and geo-politically biased at their very onset. The foremost task, thus, is to engage with the epistemological-ontological mosaics emanating from non-Western intellectual resources. One such underexplored non-Western intellectual resource is Sikhism which emerged in India around the fifteenth century. It is generally defined as a philosophical tradition of monotheism with few elements of Hinduism and Sufism. The philosophy of Sikhism presumes a fundamental unity underlying the diverse realities of the world as encountered by a variety of ‘self’ and ‘other/s’. As such, the diverse realities of the world are to be considered mutually interconnected. In contemporary times, when IR theory and practice seem fraught with increasing ‘us versus them’ tensions, the Sikh philosophy can become an important platform to rethink and re-approach the persisting dilemmas of (im)morality that engulf self-other relations. The present article aims to achieve this goal. It is divided into three sections. The first section discusses the Sikh view of self-other relations. The second section provides an analysis of the big questions of morality in Sikhism. Finally, the third section explores how the non-Western intellectual resource of Sikh Philosophy can provide an alternative understanding of self-other relations in world politics by logically expanding the boundaries of Western-centric IR and, in doing so, adding to the Global IR deliberations.