The idea of Canada becoming the 51st state of the United States is a notion that has persisted for decades, often surfacing in casual conversations, political debates, and even popular culture. It is a concept that seems to capture the imagination of some Americans and Canadians alike, fueled by the two nations' geographic proximity, deep economic ties, and shared language (for the majority of Canadians). Yet, despite these connections, the idea of Canada joining the United States remains a myth-one that overlooks the profound historical, cultural, political, and social differences that define Canada as a sovereign nation. This book seeks to explore why Canada will not, and indeed cannot, become the 51st state of the United States, while also examining the unique relationship Canada has maintained with the British Empire and the Commonwealth.