[1] He was a founding member, in 1968, of the Original Last Poets (along with Abiodun Oyewole and David Nelson, with Felipe Luciano soon added).
Kain personally created the aggressive, rhythmic delivery of spoken word aka performance poetry as it is known today.
[citation needed] He often performed with hand drums or backing musicians such as saxophonists and bass guitarists.
After legal action was successfully taken to procure compensation for work sampled by The Prodigy, spokespersons for The Prodigy claimed that efforts had been made to procure permission from Kain for use of his work but those efforts had been unsuccessful because Kain, who valued his privacy, could not be located in time.
His adopted son is actor Khalil Kain, best known for starring as "Raheem" in the 1992 crime thriller Juice featuring 2Pac.