- Because if there are always big changes in the political system for example the change of the priminister, the policy and the diplomacy may also have changes. Those changes would impact the economic system, for example, if the diplomacy between the countries that always trade becomes bad due to the political changes, the economy would decrease, because they need to have a new trade partner to trade with. When they do not have a new trade partner, their unemployment rate would increase and the economic cycle would have a depression. And also for the war, during war time, the resources will use for military uses, which will impact other industries until the end of the wae.