Why do sports fans chant? Is it just to support their team or is there more to it than that? (Spoiler alert: there is more to it than that.)

Join me in a spirited discussion which will take in the Chip Butty Song, organic living folk traditions, secular rituals, the Maori hakka, Sufi whirling dervishes, the Covid effect, Pat Nevin, various professors, Posh Spice and the origin of language. 

Then, finally answer the question - Why do sports fans chant?