While presidents threaten each other’s countries with nuclear obliteration, or repress and starve and bombard their own citizens, other humans of more constructive character cooperate across borders, national or cultural. Two of many instances I’ve just read of:
Scientists from Cyprus, Turkey, Egypt, Israel, the Palestinian Authority, Jordan, Bahrain, Iran, and Pakistan jointly operate a laboratory called Sesame (Synchrotron-light for Experimental Science and Applications in the Middle East) which opened this year. It has been built in Jordan, the only one of these countries that maintains diplomatic relations with all the others.
Water, to drink and wash: millions of people already are in desperate thirst for it, and they will become billions as population and global heating continue to rise, if nothing is done. Water can be extracted from the air, but existing methods need electrical power and high humidity. Scientists are working toward ways that would ne usable in poor countries and in any climate. One technique (Scientific American, 2017 Dec., p. 30, Donna J. Nelson and Jeffrey Carbeck, “Water Made by the Sun”) uses porous crystals called metal-organic frameworks. One of these with the weight of a gram and the size of a sugar cube contains such large spaces that its internal surface has an area like that of a football field! Using only the energy of sunlight, a thousand grams of MOFs can extract, even from desert air, 2.8 liters of water a day. The crystals were invented by Omar M. Yaghi of the University of California, Berkeley, and their development is a cooperation between his team and one at the Massachusetts Institute of Technology led by Evelyn Wang.
Usamerica, as I like to call the second largest country in the Americas, may not be all good but one of its glories is its network of research, freely involving people whose roots are in other countries.