Militarism is the idea that a state, government, or people believe in keeping a strong military and in actively using it to maintain rights, property, or to expand their nation.
A major cause of militarism is capitalism and the culture that devolves from it. A capitalist culture wants to have the largest and most effective military in case of any attack against its country's freedom or land. Along these same lines, establishing a strong military across the world strengthens a company's foreign affairs, alliances, and trade market, which plays a huge role in the success of a country's economy.
A major effect of militarism is the increased threat of war. Along with the dangers of war, come threats to a countries freedom. Another major effect of militarism is the amount of money that goes into enhancing the military and doesn't go to other needs of the country. In a militaristic culture, priority is given to the military over public services and the general needs of the country.