Realism and Liberalism

Belfer Center at Harvard University, https://belfercenter.ksg.harvard.edu/ 

The Foreign Policy blog of Stephen Walt, https://foreignpolicy.com/author/stephen-m-walt/

Freedom House in Washington, D.C. https://www.freedomhouse.org/ 

Harvard Negotiation Project https://www.pon.harvard.edu/category/research_projects/harvard-negotiation-project/

The U.S. Department of State: http://www.state.gov/

The Central Intelligence Agency: https://www.cia.gov/

The U.S. Department of Homeland Security: http://www.dhs.gov/

The Chinese Ministry of Foreign Affairs: https://www.fmprc.gov.cn/mfa_eng/

The German Ministry of Foreign Affairs: https://www.auswaertiges-amt.de/en

War in Angola https://history.state.gov/milestones/1969-1976/angola

Proxy wars https://thevietnamwar.info/proxy-war/

Perpetual Peace https://www.constitution.org/kant/perpeace.htm