Causing communities is a central activity of our office, and requires us to be activist architects. In a culture that is increasingly mediated and dispersed, we connect people through what we build. The principal task of architects is not radical form-making but a radical rethinking of community and how it can advance the human condition. Sustainable communities lead to sustainable lifestyles, lead to a sustainable relationship to the Earth. By focusing on how environments cause communities, we can directly impact the health and wellness of people.