This is an open access title available under the terms of a CC BY-NC-ND 4.0 International licence. It is free to read at Oxford Scholarship Online and offered as a free PDF download from OUP and selected open access locations.In Canada many public projects, programs, and services perform well, and many are very successful. However, these cases are consistently underexposed and understudied in the policy literature which, for various reasons, tends to focus on policy mistakes and learning from failures rather than successes. In fact, studies of public policy successes are rare not just in Canada, but the world over, although this has started to change (McConnell, 2010, 2017; Compton & 't Hart, 2019; Luetjens, Mintrom & 't Hart, 2019). Like those publications, the aims of Policy Success in Canada are to see, describe, acknowledge, and promote learning from past and present instances of highly effective and highly valued public policymaking. This exercise will be done through detailed examination of selected case studies of policy success in different eras, governments, and policy domains in Canada. This book project is embedded in a broader project led by 't Hart and OUP exploring policy successes globally and regionally. It is envisaged as a companion volume to OUP's 2019 offering Great Policy Successes (Compton and 't Hart, 2019) and to Successful Public Policy in the Nordic Countries (de La Porte et al, 2022). This present volume provides an opportunity to analyze what is similar and distinctive about introducing and implementing successful public policy in one of the world's most politically decentralized and regionally diverse federation and oldest democratic polities.