This new video series from Not Just Bikes provides a solid overview of the Strong Towns message about how the suburban development pattern is literally bankrupting cities because the cost of the infrastructure maintenance can't be covered by taxing low density suburbia. If you're an urbanist of any sort, you need to know about this. No, these people are not leftists, but yes, all of America is going to look like Flint or Detroit if nothing is done to address this. Also check out strongtowns.org, a very good resource for general urbanism and how to talk to people about urban issues.