Foreign policy shapes how nations interact on the global stage. It involves strategies and actions governments take to protect interests, promote values, and achieve goals through diplomacy, economics, and military means. Key players like the President and State Department coordinate to make decisions. U.S. foreign policy has evolved from early neutrality to global leadership. Today, challenges include terrorism, nuclear threats, and great power competition. Tools range from diplomacy to military force, with current issues spanning U.S.-China relations, regional conflicts, and climate change.