I have come to the tentative conclusion that succesful architecture follows culture, not vice versa.
In other words, if we attempt to steer culture a different direction just though architecture, we will inevitably fail. The most successful buildings are the ones that predict shifts in cultural behavior and accomodate them well (for example, the first open air malls at the end of the self-contained mall era, or the first self-contained malls a couple decades earlier). If we want to bring people outside and get them to interact with the public realm, we need to attack the problem culturally. "
If you build it, they will come" is a risky strategy.