Today Mark Zuckerberg announced a new son with his wife. His announcement, listed on Facebook, came with a message of hope and of worry. A message that described the future for this child, including such messages as "Consider disease. Today we spend about 50 times more as a society treating people who are sick than we invest in research so you won't get sick in the first place." It's a strange letter to his child, but not entirely un-Zuckerberg in its content and delivery.