The Quad, a grouping of India, the United States, Australia, and Japan, was formed in 2007 to respond to the humanitarian crisis caused by the 2004 Indian Ocean Tsunami. It has since evolved into a significant forum with the potential to impact global geopolitics. The Quad's members have had their own reasons for supporting the grouping, including clashing with China over disputed territories, dealing with China's influence in Australia, and addressing China's challenges to American interests in Asia. A decade after its dissolution, the Quad has reassembled to pursue common goals, including a rules-based international order, freedom of navigation, and peaceful settlement of territorial disputes. The rise of the Quad signals the acceptance of the "Indo-Pacific" as a strategic concept.