What is the best Isley Brothers album of all time?

Harvest for the World

The Isley Brothers' socially conscious 1976 album featuring the uplifting title track and a seamless blend of funk, soul, and protest sentiment.

This Old Heart of Mine

The Isley Brothers' 1966 Motown album featuring their biggest early hit produced by Holland-Dozier-Holland, showcasing the group's vocal sophistication.