The most remarkable phenomenon in Asia in the 21st century is arguably the economic rise of China and India. Amazingly, the two most populous countries in the world are uplifting millions of their citizens annually from poverty through rapid economic growth. What is the impact on the region, given the ascendance of China and India? There are at least two possible outcomes: the rise of the two great Asian powers may challenge the US and instill fear among the smaller countries in Asia, or, China and India will act as new economic dynamos that will benefit the region even if US economic presence in the region is to decline in the future. This book explores the opportunities and obstacles to a "harmonious" region underpinned by the rise of China and India.