The Wheel is usually the first advance a C-evo nation will seek, because it gives an almost immediate increase in the speed at which advances are discovered. The effect is doubled when you build a Superhighways system, but that will provide no benefit under Despotism.

C-evo advance, one of the "Early Advances" (not needing Science)

Wheel (C-evo): Allows: One additional trade point on every "plain terrain" tile that contains a road
Has military or other value: Nil
Obsoletes: Nil
Needed for
further advances:

Bridge Building and Invention