For nations to survive environmental decline in this world and increasing political and economic upheaval and difficulty, you will have to cooperate with each other. Instead of fighting, you will have to find ways to provide enough food, water and energy for the people of the world. That will be the prevailing and dominating need of the future here on Earth.
People who think otherwise are living in the past. Their assumptions are based upon the past. They cannot see what is occurring in their midst. They cannot ascertain what is coming over the horizon.
They are living in a shell of their own beliefs and assumptions and are blind to the realities of the world today and tomorrow. They think engagement with the universe will be the result of human exploration, but that is rarely ever the case in the universe. Intervention occurs when nations become stronger and more united. That is when the challenge to freedom and sovereignty really begins.