This is a real treat. Normally, I'd prefer a chronological order for a boxed set, but in this case, I am fully persuaded by the ordering according to 4 themes:
(1) Inspirational themes, (2) Love songs, (3) Cautionary tales, and (4) Film & Dance. It works! Ultimately, it's all Curtis that we're getting with his distinctive high voice, but it's a nice way to create some order in his musical legacy. He was one of the true innovators of soul music in the '70s (together with Marvin Gaye, Stevie Wonder & James Brown). Clear civil rights movement themes ("People get ready"), go hand in hand with great love songs ("Fool for you"), hard-hitting cautionary tales ("If there's hell below, we all gonna go"), and timeless film & dance music ("Superfly"). A mid-priced box set with 60+ minutes of great music on each of the 4 CDs. A great way to get his best material for a reasonable price.