The Center for Strategic and International Studies (CSIS) is a bipartisan, nonprofit think tank based in Washington, D.C. Founded in 1962, CSIS focuses on research and policy development to address global geopolitical challenges. The organization employs over 240 staff, including scholars and former government officials, who conduct in-depth analysis on issues such as U.S. defense policy, international security, and global health.

CSIS provides policy recommendations to U.S. government stakeholders, including Congress and the executive branch. It produces a variety of publications, including research reports and policy briefs, that influence national security and foreign policy decisions. The organization is known for its independent thought and professionalism, utilizing advanced tools like satellite imagery analysis to forecast geopolitical events. CSIS has a significant historical impact on U.S. policy, addressing issues from defense reform to global health security.