Belief systems change over time as well. If humans are 6000 years old, consider that we started out living in caves, with the strongest hunter being the chief, and men fighting one another to be the chief. They worshipped the sun, the ocean, and other natural elements, and traded in food, crafts and medicinal herbs. Over centuries, we developed belief systems based on honour, dignity, and mutual respect. We've set up systems of rights, of laws, and an assortment of belief systems, all of which have evolved as we've evolved.
We've tried to learn from our past mistakes. But recently the world is backsliding into xenophobia, paranoia, and fear. The fear of an unknown future is strong and we're at one of those turning points in history, both because of climate change and the pandemic, when our better angels can prevail and the human race can emerge stronger and wiser for our shared trauma, or we can devolve into fascism and nationalistic fervor.