Civil Society Organisations (CSOs) play an increasingly important role in the political, economic, and social dynamics that shape daily lives across the world. Encompassing a diverse range of organisations, objectives, and activities, the CSO sector is an expansive terrain characterised by dynamic relationships between leaders, agents of action, the communities, and the global challenges that drive their agenda, which span from poverty to climate emergency to injustice to inequalities. Drawing on case studies from Brazil, India, Yemen, Syria, Iran, and Turkey, this book explores the distinct challenges faced by CSO leaders, their current operational practices, and their strategies for future development. The book highlights the roles, contributions, and challenges of young CSO leaders in particular, at a time when they are taking an increasingly active role as agents for change and development. Overall, the book emphasises the ways in which CSO leaders are not only shaped by profound challenges such as Covid-19, but also proactively react and respond. It will be of interest to researchers across the fields of global development, business studies, peacebuilding, international relations, and civil society.