At this juncture, it seems to me that the most important thing we may need to learn on this planet, in order to continue to survive on it (although attending to global warming and energy greed falls a close second), is cultural tolerance, leading to the principle of cultural freedom, or what has been called multiculturalism, taken in its full meaning.
No one culture is "right," but any culture is right for the people who choose it (which often but not always might be the people who were born into it). People have a right to their culture, to practice it and not be interfered with in their practice of it. Likewise, people have a right to switch to another culture if that is who they discover they are or that they more basically identify with. Converts should be honored, just as people who remain utterly and permanently committed to a culture radically different from our own, should be honored. In the course of events, any of us might decide to move on over to another culture. There is that option of free choice. Be where you belong, be where it feels "right" to you. As the I Ching says, "no judgment."
What this implies, indeed requires, is that every culture will need to subscribe to one shared "world cultural" view: namely, that other people have a complete and total right to their cultures just as we have a complete and total right to ours, and that all and everyone agree to the principle of respect and noninterference (no use of force) into the cultural life of others, because anything else leads to bloodshed and destruction, as one "righteous" culture seeks to eliminate another "righteous" culture. (In the broadest sense, culture includes social, economic, political, religious and spritual life, art, all manner of dress and speech and customs, values such as the openness that questions authority, or values that stress respecting and obeyng authority, etc.)
One of the principles this country was founded on, one of the principle motivations that led people to cross an ocean to seek a better and different way of life, was the search for religious freedom-- not to be harassed in the practice of their religion and particular way of life. Religious freedom, thus understood, is a truly deep and important matter. This becomes especially apparent if we expand the concept of "religious freedom" to "cultural freedom." Any culture that exists has a full and equal right to exist, as does any other. As a corollary, no culture should be imposed on another culture, or upon any group (or tribe) of people who want to practice a culture different than the "surrounding" or neighboring culture. Just as endangered species are protected on this planet, so "endangered cultures" ought to be the concern of all. If I take away yours, or am indifferent to yours being extinguished, then tomorrow someone will come along to deny me my culture and to enforce their way of life on me. I give you the right to be you because you give me the right to be me, and vice versa.
Cultural tolerance and cultural freedom are perhaps the most important values we need to learn and honor on this parlous planet. I note, by the way, that this piece about not telling others what to do has the quality of being told what to do. That is indeed a paradoxical quality, to be dealt with in round two.