Conversation so far:
What was Sun Ra's philosophy?
Sun Ra presents a unified conception, incorporating music, myth, and performance into his multi-leveled equations.
What was the main premise of Sun Ra's philosophy?
Sun Ra seeks to elevate humanity beyond their current earthbound state, tied to outmoded conceptions of life and death when the potential future of immortality awaits them.

Question: Who are the Arkestra?
Self-contained rewrite: Who are the Arkestra?