Final answer:
Liberalism in international relations focuses on states as actors but also emphasizes the importance of institutions and cooperation for collective security.
Step-by-step explanation:
Liberalism in international relations focuses on states as the primary actors but also emphasizes the importance of institutions and organizations in shaping the international system. It sees states as motivated by what they perceive to be in the best interest of the system as a whole. Liberalism advocates for cooperation and collective security among states, and places importance on factors such as diplomacy, freedom of the seas, and free trade.
One example of a liberal internationalist is President Woodrow Wilson, who sought to establish the League of Nations after World War I to promote peace and global cooperation.