Shamanism is less a a diverse set of practices than it is a unified -ism that ultimately derives from South America 

Shamanism is less a unified -ism than it is a diverse set of practices found across many different populations but ultimately deriving from South America 

Shamanism is less a unified -ism than it is a diverse set of practices found across many different populations but ultimately deriving from Central Asia 

Shamanism is less a a diverse set of practices than it is a unified -ism that ultimately derives from Central Asia