Book excerpt: Housing is increasingly unattainable in successful global cities, and Toronto is no exception -- in part because of zoning that protects “stable” residential neighborhoods with high property values. House Divided is a citizen’s guide for changing the way housing can work in big cities. Using Toronto as a case study, this anthology unpacks the affordability crisis and offers innovative ideas for creating housing for all ages and demographic groups. With charts, maps, data, and policy prescriptions, House Divided poses tough questions about the issue that will make or break the global city of the future.