Global Military Spending
While the entire volume is gargantuan - totaling about $1T global spending per year - as a percentage of the global economy - this is only about 1%.
Specifically, if the USA's other military-related expenditures are counted, the total spending for the USA alone is $1.3T - . This indicates a total global budget of about $2T - or 2% of the global GDP.
Is the world becoming more peaceful? The best indicator for this could perhaps be a measurement of military expenditure as a fraction of the overall economy.
The current 1% appears to be substantially better than historically - data?_______