World War I occurred because of a combination of both. Longtime rivalries over colonial divisions, trade and economic influence and domination existed among the great powers of Europe. For example, Germany resented having too few colonies and British superior naval force. They had also created a web of military alliances and defensive obligations - both public and secret - among themselves aimed at others. In the aftermath of duke Ferdinand´s assasination and the rapid succession of events, those factors contributed to dragging them into the war.
World War I occurred because of a combination of both. Longtime rivalries over colonial divisions, trade and economic influence and domination existed among the great powers of Europe. For example, Germany resented having too few colonies and British superior naval force. They had also created a web of military alliances and defensive obligations - both public and secret - among themselves aimed at others. In the aftermath of duke Ferdinand´s assasination and the rapid succession of events, those factors contributed to dragging them into the war.
Becasue isolationism is where a country does not let anyone in or out of its borders and it does not participate in worldly afairs. It also has isolation in the name and the definition of isolation is the process or fact of isolating or being isolated.
