This book encompasses a wide range of security aspects and their transformation that will shape ASEAN in a period of great power competition: the blurring of ASEAN centrality, the growing importance of climate change, energy security, terrorism/organized crime transformation as well as digital economy and cybersecurity, considered as major regional risks and threats. The book shows how ASEAN is trying to be on the forefront on the in-depth global and regional discussions and policies on these issues.