Obviously the family goes to Michael to answer the last question.

What is not expressed often is Michael's total lack of humanity. Characters like Vito Corleone, and Tony Soprano and Nucky Thompson, others are bad guys, but they have an element of humanity to them. They show compassion, and they have subordinates who are loyal to them out of something more than fear. Michael has none of that. Everything he does is calculated and he always has an agenda. He is never kind for the sake of being kind. It is no surprise he ends up alone with no friends or family.