Professor Simon Hallsworth argues that, where they exist, gangs in the UK are "far more fluid, volatile and amorphous than the myth of the organized group with a corporate structure". This assertion is supported by a field study conducted by Manchester University, which found that "most within- and between-gang disputes... emanated from interpersonal disputes regarding friends, family and romantic relationships", as opposed to territorial rivalries, and that criminal enterprises were "rarely gang-coordinated... most involved gang members operating as individuals or in small groups."