Joshua Geltzer

ASU Future of War Fellow

Joshua Geltzer, ASU Future of War Fellow, is writing a book exploring challenges associated with modern communications technologies such as social media platforms, file-upload sites, and internet search engines.  He is the executive director and visiting professor of law at Georgetown University Law Center's Institute for Constitutional Advocacy and Protection.  

From 2015 to 2017, he served as senior director for counterterrorism at the National Security Council staff, having served previously as deputy legal advisor to the National Security Council and as counsel to the assistant attorney general for national security at the Department of Justice.  He also served as a law clerk to Justice Stephen Breyer of the U.S. Supreme Court and, before that, as a law clerk to Chief Judge Alex Kozinski of the Ninth Circuit Court of Appeals.  

Josh received his J.D. from Yale Law School, where he served as editor-in-chief of the Yale Law Journal, and his PhD in War Studies from King’s College London, where he was a Marshall Scholar.  Before that, he attended Princeton University, majoring in the Woodrow Wilson School of Public and International Affairs.  He is the author of US Counter-Terrorism Strategy and al-Qaeda: Signalling and the Terrorist World-View, published by Routledge; and his work has appeared in The Atlantic, Foreign Policy, ParametersStudies in Conflict & Terrorism, the Journal of Constitutional Law, and the Berkeley Journal of International Law.

All Work

Confronting Trump: We Can’t Be Outraged About Everything, All of the Time

Joshua Geltzer wrote for Just Security on the need to not be outraged by everything President Trump does, all the time.

Boston Police Commissioner Joins Legal Effort to Protect ‘Dreamers’

Joshua Geltzer was quoted in the Boston Globe regarding the lawsuit seeking to preserve the Deferred Action for Childhood Arrivals policy.

Faith Leaders Say Trump’s Anti-Muslim Tweets Violate Constitutional Protections

Joshua Geltzer was quoted in the Washington Post regarding President Trump's use of Twitter.

Faith Based Leaders’ Letter to Trump: Anti-Muslim Tweets Threaten the First Amendment

Geltzer, his colleagues from the ICAP, and religious organizations wrote to Pres. Trump about the First Amendment and his use of Twitter.

Pentagon Foresees at Least Two More Years of Combat in Somalia

Joshua Geltzer was quoted in the New York Times on the proposed two-year extension of U.S. counterterrorism operations in Somalia.

Trump's National Security Strategy is Decidedly Non-Trumpian

Joshua Geltzer was quoted in the Atlantic regarding President Trump's new national-security strategy.

Trump’s Voter Fraud Commission Plans to Create a Massive Voter Database. Former National Security Officials Say It Could Be Hacked.

Joshua Geltzer was quoted in the Washington Post on the cybersecurity risks associated with the Pence-Kobach Commission on voter fraud.

Is It Legal for Trump to Block You on Twitter? Maybe Not

Joshua Geltzer was quoted in Salon on President Trump's use of Twitter and its intersection with the First Amendment.

Trump's Dangerous Guantánamo Fixation Will Fuel Fire for Terrorists

Joshua Geltzer wrote for The Hill on why Trump's suggestion to send Sayfullo Saipov to GTMO is counterproductive and potentially harmful.

Georgetown Law Joins Columbia in Trump Twitter Challenge

Joshua Geltzer was quoted by Multichannel News in relation to President Trump's use of Twitter and the First Amendment.

First Amendment Advocates Charge Trump Can't Block Critics On Twitter

Joshua Geltzer was quoted by NPR in relation to the lawsuit filed against President Trump and how he uses his personal Twitter account.

Why the First Amendment Constrains Trump’s Use of Twitter

Joshua Geltzer co-wrote for Just Security on why the First Amendment can constraint President Trump's use of Twitter.