These is the common reasons why the price and money supply in the market is being inflationary and deflationary it's because of our economic problem like oil hike price and the sufficiency products distribution. So it is very important to maintain the peaceful situation in our whole world so the relationships of all country can be peace and happy together.
Unfortunately, such goal is quite hard, even impossible, to achieve, because world biggest countries in the first place are thinking about national interest, not about the global situation. Especially now, when there are the complicated political situation and a lot of conflicts between world "leaders", well-being of "simple" people sometimes can be sacrificed for the greater good of a nation. And of course a lot of money is spending on those conflicts, so it usually deepens financial problems of countries. So we can only hope that someday, we will become smarter and manage our resources more rationally. 