Best known for his monumental sculptures, Ronald Bladen (1918-1988) was regarded as an artistic forerunner by such minimalist artists as Donald Judd, Sol Lewitt, and Carl Andre. But in contrast to the matter-of-fact work of these artists, Bladen's sculptures are charged with emotional power. They fill entire rooms, pressing outward against the walls and ceiling; their themes include the force of gravity, the dynamism of planar surfaces, the impact...