I think that both Vito and Michael wanted to be legitimate only as a means to their end which ultimately were power. I think that they would still have engaged in murder and mayhem as Michael obviously did. Both Vito and Michael had opportunities to just walk away. But they didn't because they considered murder as a legitimate recourse.


"Generosity. That was my first mistake."
"Experience must be our only guide; reason may mislead us."
"Instagram is Twitter for people who can't read."