Who is "we"? What do you mean by "should"? I'm not sure that suburbanization and urban sprawl are under anyone's control, as population growth, migration, and industrial growth and collapse are not under anyone's control. I would suggest these questions: - Can we promote living in harmony with mother Earth? - Can we create vibrant local economies with healthy living? - Can we create infrastructure appropriate to those economies - What technological changes can we encourage to reduce the need for individual transit and even mass transit?