A world where progress is continuous and inevitable
The antithesis of Medieval Stasis, a Whig World is a setting in which scientific knowledge, technology, social organization, and perhaps morality become ever-more sophisticated and advanced. If there are occasional setbacks to civilization's forward march, these are simply preludes toward a new renovation of civilization, in which the flaws exposed by the crisis are corrected and civilization emerges stronger and more advanced than ever, its progress essentially uninterrupted. In Darker and Edgier versions of a Whig World, the imperative is to advance or be conquered. Scientific progress may be unaccompanied by moral progress, and those who Can't Catch Up are either subjugated, assimilated, or annihilated by those who overtake them. This is the standard in 4x games. In Lighter and Softer versions, there could be a Prime Directive prohibiting interference with less advanced people, or possibly a charitable commitment to (non-coercively) helping them catch up or uplift them.