The treaty of varsailles restricted Germany for example : having a great army and building their navy and stripping away their territories, making the then leaders of Germany upset as well as the German people. hence setting the stage for Hitler to take power and take Germany and the world into ww2
Mercantilism perpetuated the rigid trade system between England and the colonies. Only the colonies were allowed to trade with the parent country. This restricted free trade among the colonists barring them from cutting the middleman role of the parent country. Mercantilism only furthered animosity between country and colonies, leading to eventual war.
