Did you just use Mayo and force together? Mayo forced nothing during his tenure, as the weakest coach in Pats history. Mayo's culture is what you get by default when no one is establishing a winning culture. Really, it's the opposite of what you said. A winning culture needs to architected, communicated, modeled, cultivated and enforced. It does not happen organically. This is true of any large team, sports or otherwise. It is a constant, dynamic process, but it gets easier once established and team members -- not just the leaders -- understand the goals and work to preserve and enhance the culture.