After today's games in class, what I suggest is that we can think about limiting the strenght of growing nations, and give a kind of long life to weak nations. By doing so, the competition might be tough, and a little bit long between superpowers. We can also think about some new infracstructures for shipping / transporting ressources. For example, from African continent to European/or from Asia to the Americas etc... We might also think about the system of debt, for example, if a colonial power is attacking a colony, this colony can ask for help from another power, by endebtting himself, so as to defend his land.