Last year saw the highest number of terrorist incidents since 2000, according to the latest Global Terrorism Index released by the Institute for Economics and Peace. Worldwide, the number of terrorist incidents increased from less than 1,500 in 2000 to nearly 10,000 in 2013. Sixty percent of attacks last year occurred in Iraq, Afghanistan, Pakistan, Nigeria and Syria.

The report suggests that U.S. foreign policy has played a big role in making the problem worse: "The rise in terrorist activity coincided with the US invasion of Iraq," it concludes. "This created large power vacuums in the country allowing different factions to surface and become violent." Indeed, among the five countries accounting for the bulk of attacks, the U.S. has prosecuted lengthy ground wars in two (Iraq and Afghanistan), a drone campaign in one (Pakistan), and airstrikes in a fourth (Syria).

The report defines terrorism as “the threatened or actual use of illegal force and violence by a non-state actor to attain a political, economic, religious, or social goal through fear, coercion, or intimidation.”

The U.S. will invest somewhere between $4 and 6 trillion on the wars in Iraq and Afghanistan, with untold additional resources spent on anti-terrorism efforts elsewhere, according to the Harvard Kennedy School of Government. While we haven't suffered any major terrorist attacks on U.S. soil since 9/11, the Global Terrorism Index numbers cast considerable doubt on whether that money's been well-spent. And they give some credence to the notion that our ham-handed foreign policy is actually a destabilizing factor in world affairs.

In other news, the Obama administration recently approved doubling the number of troops we currently have on the ground in Iraq.