Skip to Main Content
Brown University
Brown University

Costs of War

Search Menu

Site Navigation

  • Home
  • About
    • People
    • Contributors
    • Funders
  • Costs
    • Human
    • Economic
    • Social & Political
    • Environmental
  • Papers
  • Findings
  • In the News
    • More from our Contributors
  • Teaching
  • Donate
Search
Costs of War

Findings

Papers

View all Papers

Findings

Some of the Costs of War Project’s main findings include:

Recent Findings

  • In the two years since the October 7, 2023 Hamas attack on Israel, the U.S. government has spent $21.7 billion on military aid to Israel.
  • The U.S. has spent an additional $9.65 – $12.07 billion on military operations in Yemen and the wider region since October 7, 2023, for a total of $31.35 – $33.77 billion and counting in U.S. spending on the post-10/7 wars.
  • As of October 3, 2025, 67,075 people in Gaza have been killed and 169,430 people injured according to the Gaza Ministry of Health. These 236,505 casualties constitute more than 10% of the pre-war population in Gaza.
  • At least 5.27 million people have fled or been forced to leave their homes (as of early September 2025) in the post-Oct.7, 2023 wars in Gaza, Iran, Israel, Lebanon, and the West Bank. This total includes an estimated 1.85 million children under 18.
  • Military spending produces an average of 5 jobs per $1 million. The same investment in other sectors creates more employment - nearly 13 jobs in education, 9 in healthcare, and 7-8 in infrastructure and clean energy.
  • From 2020 to 2024, private firms received $2.4 trillion in contracts from the Pentagon, approximately 54% of the department’s discretionary spending of $4.4 trillion.
  • The expanding tools of political influence used by the arms industry include extensive lobbying, millions in campaign donations, the revolving door, funding think tanks, and involvement in government advisory committees.
  • U.S.-backed Israeli military operations since Oct. 7, 2023 will lead to far higher indirect death than direct death rates.
  • Over the course of the war in Afghanistan (2001-2021), 24% of U.S. women service members and 1.9% of men experienced sexual assault.
  • The “Military-Industrial Complex” is enmeshed with Silicon Valley. A growing portion of Pentagon spending goes to large tech firms.
  • War contributes significantly to climate change: The U.S. Defense Department is one of the world’s top greenhouse gas emitters.
  • Official U.S. discourses about security threats from China and Russia are characterized by threat inflation.
  • Americans are inundated with cultural products that promote militarism – many of them influenced by the Pentagon. From movies to sporting events, the entertainment we consume normalizes war, reducing reflection about U.S. policy choices and their consequences

United States Post-9/11 Wars 

  • The wars have been accompanied by erosions in civil liberties and human rights at home and abroad.
  • The U.S. government is conducting counterterror activities in 78 countries.
  • An estimated 3.6-3.8 million people have died indirectly in post-9/11 war zones, bringing the total death toll to at least 4.5-4.7 million and counting.
  • At least 940,000 people have died due to direct war violence, including civilians, armed forces on all sides, contractors, journalists, and humanitarian workers.
  • U.S. policymakers scarcely considered alternatives to war in the aftermath of 9/11 or in debating the invasion of Iraq. Many of those alternatives are still available.
  • The cost of the post-9/11 wars in Iraq, Afghanistan, Pakistan, Syria, and elsewhere totals about $8 trillion. This does not include future interest costs on borrowing for the wars.
  • 38 million people have been displaced by the post-9/11 wars in Afghanistan, Pakistan, Iraq, Syria, Libya, Yemen, Somalia, and the Philippines.
  • The costs of caring for post-9/11 war vets will reach between $2.2 and $2.5 trillion by 2050 - most of which has not yet been paid.
  • Post-9/11 war veterans are suffering a mental health crisis. At least four times as many active duty personnel and war veterans of post-9/11 conflicts have died of suicide than in combat.
  • The ripple effects on the U.S. economy have also been significant, including job loss and interest rate increases.

Papers

View all Papers
Brown University
Providence RI 02912 401-863-1000

Quick Navigation

  • Visit Brown
  • Campus Map
  • A to Z
  • Contact Us

Footer Navigation

  • News
  • Events
  • Campus Safety
  • Accessibility
  • Jobs at Watson
Give To Brown

© Brown University

Brown University
For You
Search Menu

Mobile Site Navigation

    Mobile Site Navigation

    • Home
    • About
      • People
      • Contributors
      • Funders
    • Costs
      • Human
      • Economic
      • Social & Political
      • Environmental
    • Papers
    • Findings
    • In the News
      • More from our Contributors
    • Teaching
    • Donate
All of Brown.edu People
Close Search

Findings