The Rock plays Riddick.
William Bridges -LRB- 1933 - February 17 , 2013 -RRB- was an American author , speaker , and organizational consultant .. He emphasized the importance of understanding transitions as a key for organizations to succeed in making changes .. He says transition is the psychological process of adapting to change .. Transition consists of three phases  : letting go of the past , the `` neutral zone '' where the past is gone but the new is n't fully present , and making the new beginning .. He was educated at Harvard , Columbia and Brown and taught American Literature at Mills College until 1974 when he became a consultant .. Harvard. Harvard. Columbia. Columbia University. Brown. Brown University. Mills College. Mills College. Bridges died on February 17 , 2013 from complications of Lewy body disease at his home in Larkspur .. Lewy body disease. Dementia with Lewy bodies. He was 79 .