Human beings have to bring their behavior in line with the inherent symbiosis of all living things. Also I think the invention of the nation state, which is really historically a recent phenomenon, is obviously a great danger for the earth itself. Nationalism, war departments relabeled defense departments . . . It's a risky way to live for the planet, but I haven't a ghost of an idea what a better way would be. Yet I suspect in my moments of optimism that we'll learn something new and different and begin reducing the risk.
People seem to actually like to fight sometimes.
It seems endless. The way the international community of science generally behaves is a good example of bridging national boundaries for the common good. If you leave scientists alone, they will communicate nearly everything they know. In this century almost anything that was any good that affected the core of science was the result of collaboration across national boundaries. That began in the 19th century and continues despite the difference in national boundaries.