This book assesses the forces that led to the election of Tsai Ing-wen and the Democratic Progressive Party (DPP) in 2016 and re-election in 2020, and provides the first comprehensive treatment of this pivotal period in Taiwan’s politics, policy, and international relations. The Democratic Progressive Party’s victory in Taiwan’s 2016 presidential and legislative elections marked several significant turning points. The third peaceful transition of power between political parties during Taiwan’s democratic era heralded further consolidation of Taiwan’s democracy, and Tsai Ing-wen’s election gave the Republic of China its first female president. Her administration has pursued an ambitious agenda of domestic and foreign policy reforms, and has faced challenges that include steering through economic transitions, addressing contentions issues of social justice, national identity and cultural change, and navigating an external environment defined by an increasingly powerful and hostile China, and a more supportive but less predictable United States. In Taiwan in the Era of Tsai Ing-wen, leading experts from the US and Taiwan chart the progress and problems of Tsai’s first term and the prospects for Taiwan during her second term and beyond. As a study of a crucial era of politics in Taiwan, this book will appeal to students and scholars of Taiwan studies, Political Science, Law, Economics and International Relations.