The places were carved up by imperialism as they all offered access to goods that European nations didn't have. It also opened up new markets for them to sell their own goods and ideas and extend their spheres of influence. The Middle East, Asia, and parts of Africa were also important because of the very wealthy and influential trade routes that could bring more wealth to the nation that could control them. The Americas offered an abundance of raw materials and riches. Add in the land, that could be used for settlement reasons. Settlements meant more money.
Rough, cold, tons of disease
The Ottoman Empire expanded to quickly and during war time which the economy was hurt by insurgents lead by Lawrence of Arabia, the siege of Gallipoli and British Invasion
Franklin Roosevelt rose in the hour of need as the great depression took a toll on the Americans.
He had an experience in public oratory and hence impeccable persuasion skills that made him pass the New deal. his experience as Governor also came at hand for him in his presidential career.