Unfortunately, Mihaly Csikszentmihalyi died last year. His wisdom from living through the second World War, his father being the Hungarian Ambassador in Rome at the time the communist takeover of Hungary in 1949. It is probably just my fantasy but it would have been great if he could have sat down for a quiet chat with Putin and explained the misery, tragedies, insecurities that are the toll of losing freedoms, jobs, homes, can impose on the innocent. His deep wisdom into the secret to happiness is still very relevant today. 

This is an important TED talk that Mihaly gave in back in 2008 covering the lead into how he started describing the flow experience. It is wonderful context told in a series of stories,

His book (1990). Flow: The Psychology of Optimal Experience, will give you greats insight in the Flow State