From the 1920s to the 1950s, behavioral psychology dominated much of psychological thought, but the cognitive revolution of the 1950s revealed cracks in the theories of the radical behaviorists, and cognitive psychology eventually managed to gain the upper hand.
The heavyweight division in mixed martial arts (MMA) generally groups fighters between 205 and 265 lb (93 and 120 kg). Although many ambiguities exist within the lower weight classes regarding division naming and weight limits, the Heavyweight division is, for the most part, uniform.
Ranking the 10 Best Boxers in the Middleweight Division. 1 of 11. Mike Stobe/Getty Images. The middleweight division is one of the most top-heavy in the sport of boxing. There are two men who can lay legitimate claim to the top spot and a ton of talented veterans and contenders jockeying for position right below them.