TwoSix
Everyone's literal second-favorite poster
The change from Civ4's squares and stacking armies to Civ5's hexes and one unit per tile are pretty akin to the change from TSR AD&D to WotC "d20" D&D, I would agree.First 3 or 4 civs were evolutions from each other. CivV inwards are basically reimaginings.
Civ4 generally considered the best 1. I like 3 and SMAC myself.