Twitter enables people to help each other in real time, which can be more efficient and effective than any government services. - Newton Lee

One should not underestimate the power of persuasion by well-crafted propaganda films. D. W. Griffith's The Birth of a Nation in 1915 helped to resurrect Ku Klux Klan in Georgia; and Leni Riefenstahl's award-winning Triumph of the Will in 1935 helped fuel the rise of Nazism in Germany.

The formidable power of social media can be both liberating and scary.

The real solution to human longevity will likely involve both traditional and alternative medicine, scientific and philosophical problem-solving, as well as big data analysis and human intuition.