There's a wonderfully made two-part podcast documentary about Sly Stone and the Family; the documentary focuses on one song but is really a well-told story about the world around Sly Stone: https://500songs.com/podcast/song-175-everyday-people-by-sly...

Sly wasn't just a brilliant performer, singer, and accomplished multi-instrumentalist but a fantastic songwriter and hugely influential producer. He knew his way around music and lost sight of all ways.