"War is the continuation of business by other means." — Bertolt Brecht 
"War is business and business is good for America," [ Britain, France, Germany, Russia, Canada, Israel, and others]

"The latest Global Peace Index report finds that the economic impact of violence to the global economy was $13.6 trillion in 2015 in terms of purchasing power parity (PPP). This is equivalent to $5 per day for every person on the planet, or 11 times the size of global foreign direct investment (FDI).

The toll of violence is typically counted in terms of its human and emotional cost, but the financial damage to the economy is yet another additional factor to consider. When counting the economic impact one must look at the costs of preventing and containing violence, as well as measuring its consequences. This is important because spending on containing violence, while perhaps necessary, is fundamentally economically unproductive.

How do you "add up" the costs of war?

IEP’s method is a comprehensive accounting exercise to "add up" those direct and indirect expenditures related to creating and containing violence plus its consequential costs. These include not just military spending but domestic expenditures on security and police plus the losses from armed conflict, homicides, violent crime and sexual assault.

The $13.6 trillion of expenditures and losses represent 13.3% of world GDP. To break this figure down, it’s the equivalent of $1,876 for every person on the planet. The numbers refer to the current expenditures and their estimated flow-on effects in 2015, and are represented in PPP international dollars.

These numbers are notable for two reasons. Firstly, over 70% of the economic impact of violence accrues from what is mostly government spending on the military and internal security. This shows that significant amounts of government expenditure are tied up to this end. In a perfectly peaceful world, these huge resources could be directed elsewhere.

Secondly, the remaining amount is consequential losses from violence and conflict and these, too, are enormous. They significantly outweigh the international community’s spending on building peace.

A quick examination of the numbers reveals that the world continues to spend vastly disproportionate resources on creating and containing violence compared to what it spends on peace. In 2015 alone, UN peacekeeping expenditures of $8.27 billion totalled only 1.1% of the estimated $742 billion of economic losses from armed conflict.

War cost us $13.6 trillion in 2015

Via Michael Roberts