Quad nations must engage in multilayered effort to deter China

The leaders of Australia, India, Japan and the U.S. met in Washington on Sept. 24 for their first in-person summit for the Quadrilateral Security Dialogue. The four "Quad" nations issued a joint statement calling for annual meetings of leaders and foreign ministers. The improving relations among these countries, which share values like freedom, democracy and the rule of law, is particularly significant in deterring an increasingly authoritarian China.