I have sometimes wondered about the following:

(1) Who was the first articulate that in dealing with $G$-equivariant cohomology theories ($G$ a finite group or a compact Lie group), it is best to work in an $RO(G)$-graded context?

(2) Who was the first to realize that the correct set up for equivariant stable homotopy was to work in a complete universe?

(3) At what time did these ideas first come to the surface? The seventies? The eighties? How much do they predate the Segal conjecture?

(Maybe I should thank Peter May in advance?)