Religious Religious civilizations do not experience prolonged periods of anarchy during revolutions, and religious city improvements (Temples, for instance) are easier to build. Scientific Scientific city improvements (like research labs) are easier to build and the civilization receives a free Civilization Advance at the start of every era. Seafaring Each city built along the coast receives a commerce bonus in the center city square, and Seafaring city improvements (such as the Harbor or Commercial Dock) are easier to build. Ships move faster and are less likely to sink in the sea or ocean.