 It's been giving us joy and aggravation for 50 years, either defeat or a satisfaction of accomplishment. The Rubik's Cube was introduced to the world in 1974 by Erno Rubik, a Hungarian architect, designer, sculptor, and retired professor. Problem solving, it's a very basic activity of human mind. As of this past January, some 500 million Rubik's Cubes have been sold worldwide, making it the world's best-selling puzzle game and best-selling toy.