An NSA security posters from the 1950s or 60s

Security Studies: Foundations and Key Concepts

Security studies originated in the era of Cold War geopolitics and decolonization. This annotated bibliography introduces readers to scholarship in the field.
Factories Emitting Pollution

Why Climate Change Is a National Security Issue

Viewing climate change through a national security lens makes a certain amount of sense -- but it won't entirely solve the problem.
Turkish elections

The Turkish Origins of the “Deep State”

The "deep state" idea of a shadowy parallel government, heard much in the news now, seems to be a concept borrowed from the Turkish experience.
German dissidents Friedrich and Pauline Kellner's 1935 passport photos

Papers, Please: The Invention of the Passport

Immigration and national security remain at the top of President Trump’s agenda. He issued a revised executive order ...
The Death of General Mercer at the Battle of Princeton, January 3, 1777

Immigration and National Security on George Washington’s Day

Presuming that immigration was a boon to national security, U.S. borders remained mostly open for the first century of the nation’s existence.
Seattle Post Intelligencer newspaper from 1928 announces that Olmstead is guilty of bootlegging.

An Early Wiretapping Case

Wiretapping made its debut in front of the Supreme Court in 1928.