They started to trade with others to buy up more land (territories) so eventually they contribute to territory growth
When a world war has just finished, the country's resources are depleted. So, it is difficult to provide jobs and houses for returning soldiers because these would require manpower and monetary resources. The period after the war is dedicated to picking up the scrap and trying to make do with what's available through cooperation. So, for me, the most appropriate course of action is helping labor unions work together with businesses.
The answer isn't simple. There are many reasons throughout these countries why each country chose a non-democratic government. However, one main reason for many countries is because of the "blame game." Many countries at the time were failing, and naturally people pointed at their own governments at that time, and unfortunately most of these were democratic. People started blaming the democratic governments for the country's relative poor-being, and when people like Hitler used this to his advantage new anti-democratic governments arose, like communist, fascist, and Nazi Germany.
