Best Grand Strategy Board Games

Grand strategy and 4X games have carved out a large niche in the world of video games, but these genres originate from the tabletop with games like Risk, Axis & Allies, and ridiculously large (and lengthy) war simulation games like The Campaign For North Africa. Grand strategy games often see players amassing armies, building up an efficient economy, and exploring a large map, slowly spreading their influence across it through diplomacy and/or military force.