The global costs of terrorism since 70s

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https://poelposition.blogspot.com/2026/04/the-global-costs-of-terrorism-since-70s.html

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Here is am Introductory **10-line summary** of a discussion on the cost of global terrorism since the  1970 hijackings kicked off..

1. Modern global terrorism is often traced to the 1970 Dawson’s Field hijackings and related PFLP actions involving Syria/Jordan.  

2. According to Global Terrorism Database (GTD) data since 1970, terrorist attacks have caused roughly 280,000 deaths and 360,000 injuries worldwide.  

3. Direct economic costs from incidents (damage, lost lives, medical) total in the low trillions of USD since 1970, with peaks post-9/11 and in 2014 (ISIS surge).  

4. Annual deaths fluctuated sharply: low pre-2000, peaking at ~45,000 in 2014, then declining but rising again in recent years (e.g., 8,352 in 2023).  

5. Increased security spending and counter-terrorism efforts (including post-9/11 wars) add multiple trillions more, with U.S. costs alone estimated at $6–8+ trillion.  

6. Broader societal costs include lost tourism, reduced investment, trade disruptions, and GDP drag in affected regions.  

7. Loss of trust is a key intangible factor: terrorism erodes social confidence, increases polarization, surveillance, and everyday friction costs across society.  

8. Total estimated cost since 1970 (direct + security + indirect + trust erosion) likely ranges from $5–10+ trillion in today’s dollars.  

9. These figures are conservative; most terrorism impact is concentrated in conflict zones, while global responses create widespread, long-term expenses.  

10. The human and economic toll, though tragic, remains small compared to other forms of violence like armed conflict or homicide globally.

Expanded 

**The modern era of global terrorism is often traced to the early 1970s wave of high-profile airline hijackings and related attacks by groups like the Popular Front for the Liberation of Palestine (PFLP).** This response  specifically mentions the “1970 hijackings in Syria,” which aligns with events around the Dawson’s Field crisis (September 1970), where PFLP militants hijacked multiple airliners (with one incident involving a diversion linked to Syria/Damascus in the broader 1969–1970 wave) and triggered the Black September conflict in Jordan with Syrian military involvement. This period marked a shift to coordinated, international terrorism aimed at media attention and political leverage.

The **Global Terrorism Database (GTD)** from the University of Maryland’s START consortium provides the most comprehensive open-source record, covering over 200,000 terrorist incidents worldwide from 1970 through 2020 (with updates in later GTI reports extending coverage). It defines terrorism as the threatened or actual use of illegal force and violence by non-state actors to attain political, economic, religious, or social goals through fear, coercion, or intimidation.

### Number of People Killed and Injured

Analyses of GTD data (up to roughly 2020–2023) indicate that terrorist attacks have caused **approximately 280,000 deaths and 360,000 injuries worldwide since 1970**. This equates to rough averages of ~6,000 deaths and ~8,000 injuries per year, though the distribution is highly uneven—many years had far lower figures, with sharp peaks in the mid-2010s (e.g., ~44,000–45,000 deaths in 2014 alone, driven by groups like ISIS/ISIL).

- Highly lethal attacks (the top ~1% involving 25+ fatalities) alone accounted for over 140,000 deaths between 1970 and 2018.

- Annual Global Terrorism Index (GTI) reports from the Institute for Economics and Peace (IEP) show later fluctuations: e.g., 8,352 deaths in 2023 (a 22% rise from the prior year but 23% below the 2015 peak), with ongoing activity concentrated in conflict zones like sub-Saharan Africa, the Middle East, and South Asia.

- Note: Figures can vary slightly by source due to definitions (e.g., whether perpetrator deaths are included, underreporting in low-media areas, or updates to GTD). Pre-2000 levels were generally lower; the post-2001 surge (especially 2012–2017) drove much of the total.

These human costs are tragic but represent a tiny fraction of global deaths from other violence (e.g., armed conflict kills ~9× more people annually; homicide ~45× more).

### Economic Costs of Global Terrorism

Direct costs (deaths, injuries, property damage, and short-term GDP losses from incidents) are tracked in the GTI via a bottom-up cost-accounting model (valuing statistical lives lost, medical costs, etc.). These are **conservative** and exclude broader ripple effects.

- From 2000–2018: ~**$855 billion** total (peaking at $111 billion in 2014; e.g., $33 billion in 2018, $26.4 billion in 2019, $84 billion in 2016).

- Pre-2000 costs were substantially lower (terrorism deaths/incidents were fewer). A rough extrapolation for the full 1970–present period puts **direct incident-related economic impact in the $1–2 trillion range** (in nominal USD, not adjusted for inflation or growth).

**This understates the true cost dramatically.** GTI and other studies explicitly note that their figures omit:

- **Increased security and counter-terrorism spending** (the largest component).

- Indirect effects on business/investment.

- Long-term societal/friction costs, including loss of trust.

#### Increased Security and Societal Costs

Terrorism triggers massive preventive spending by governments, businesses, and individuals—often exceeding direct damage. Examples:

- **Post-9/11 U.S. response**: Homeland security spending rose sharply (e.g., from ~$56 billion in 2001 to $99+ billion by 2005, or ~0.35% of GDP). Wars in Afghanistan, Iraq, and related operations (triggered by 9/11) have been estimated at **$6–8+ trillion** for the U.S. alone over two decades (including long-term veterans’ costs, interest on debt, etc.).

- Globally: Increased military/intelligence budgets, airport/private security, border controls, and insurance premiums. One analysis estimated annual global homeland-security-style increases in the tens of billions even in the mid-2000s; scaled over 50+ years and worldwide, this adds **multiple trillions**.

- Broader economic drag: Reduced foreign direct investment (FDI), trade disruptions (~4% drop in bilateral trade after attacks), tourism losses, and slight per-capita GDP growth reductions (~0.05% annually in affected countries, compounding over decades). Terrorism also crowds out productive public spending.

**Loss of trust** is a key intangible factor the query highlights. Terrorism erodes generalized social trust (especially for those exposed in adolescence/early adulthood), increases polarization, reduces cooperation, and fosters a “friction economy” of heightened suspicion, surveillance, and transaction costs. Studies link it to lower confidence in institutions, support for extreme policies, and long-term societal inefficiencies—hard to monetize precisely but contributing to slower growth, higher insurance/risk premiums, and diverted resources. These effects persist beyond the attacks themselves and amplify security costs.

**Overall estimated total cost since 1970**: **Several trillions of USD** (likely $5–10+ trillion in today’s dollars when including security/response, indirect economic losses, and unquantified trust erosion). Direct incident costs are “only” low trillions at most, but containment/response (security + wars) and societal friction dominate. For context, even the GTI calls its direct figures conservative and notes terrorism’s containment costs often exceed the damage itself.

These are order-of-magnitude estimates—terrorism’s impact is highly concentrated (geographically in conflict zones; temporally in peaks like 2014 or post-9/11). Most years and countries see minimal direct effects, but the global response creates widespread, enduring costs. Data gaps exist (e.g., exact GTD cumulative casualties vary slightly by update), and attribution (e.g., how much of post-9/11 wars counts as “terrorism cost”) involves judgment. For the latest GTD/GTI data, refer to start.umd.edu or economicsandpeace.org.