An adult human contains about 100 trillion cells, and for us to survive, these must work together, communicate with one another, and learn from each other. On common ground, shared culture, shared resources, shared common dharma! In absence of shared dharma, common DNA is useless!
We are 150 cr and more, do we bother to take care of each other by active participation in national activities? Only electing representatives is lazy form of democracy, exposing active ground of corruption for foreign vultures. If 100 trillions can work , we too can.