As Hong Kong is integrated into the People’s Republic of China, ever fewer people in the city identify as Chinese. Two Systems, Two Countries explains why. Two Systems, Two Countries traces the origins of Hong Kong nationalism and introduces readers to its main schools of thought: city-state theory, self-determination, independence, and returnism. The idea of Hong Kong independence, Kevin Carrico shows, is more than just a provocation testing Beijing’s red lines: it represents a collective awakening to the failure of One Country Two Systems and the need to transcend obsolete orthodoxies. With a conclusion that examines Hong Kong nationalism’s influence on the 2019 protest movement, Two Systems, Two Countries is an engaging and accessible introduction to the tumultuous shifts in Hong Kong politics and identity over the past decade.