As humans we are pre-disposed to bonding in groups. We all know the joy in belonging, whether that’s to a family group, a sports team, or some kind of club or society. We rapidly develop a sense of loyalty to groups to which we feel we belong, this is known as ‘in-group loyalty’. At its most intense in-group loyalty takes the form of ‘identity fusion’ which is when a person feels a visceral sense of belonging to a group, a sensation so strong that the person primarily identifies themselves as a member of the group rather than an individual (1).