Positioned at the intersection of regional leadership and global influence, this reference work offers a rigorous and timely analysis of Brazil’s evolving geopolitical role—as the world’s fifth largest nation, South America’s leading power, a strategic South Atlantic actor, and a pivotal member of the expanding BRICS+ coalition. Structured into four insightful parts (1) The Making of Brazil as an International Actor, (2) Geo-Economics and Technology, (3) Classic Perspectives on Geopolitics, and (4) Contemporary Debates: Critical and Meta Geopolitics - this book brings together a rich array of topics that reflect Brazil’s multifaceted global engagement. Beyond traditional themes like Brazilian politics, economy, and foreign policy, this volume delves into pressing contemporary issues: energy geopolitics, defence, regional engagement, Amazon geopolitics, polar and outer space affairs, nuclear autonomy, marine spatial planning, naval projects, food security, lithium, Artificial Intelligence, and submarine cables. The book also explores Brazil’s strategic relationships with China, the United States, and the European Union, while offering fresh perspectives on its ties with African nations (e.g., Angola, Mozambique, Cabo Verde, Nigeria, South Africa), Russia, and India. Broader global themes such as ZOPACAS, CPLP, BRICS+ cooperation, and UN Security Council reform are also critically assessed.