Cutting a broad swath through the history of twentieth-century Canada, Greg Donaghy uses extensive interviews and untapped archival sources to challenge the prevailing view of Martin as simply an ambitious Windsor ward heeler and party operator. Martin embraced a tolerant politics of compromise and accommodation that sought to unite Canadians in search of a more just and equitable world. Though some mocked his ambition and doubted his progressive politics, his resolute championing of health care and pension rights, new meanings for Canadian citizenship, and internationalism in world affairs would leave an indelible mark on Canada’s political landscape.