How does learning about the past help us understand the present and make decisions about the future?

because the past stands like a pillar for our present.it is the foundation of our present.

Explanation:

Looking back into history tells us why we do these things. ... We should be able to see mistakes made in the past and hopefully we can learn and avoid repeating them while at the same time look and learn of the good things of the past.

indigenous people north and south were displaced, died of disease, and were killed by europeans through slavery, rxpe, and war. in 1491, about 145 million people lived in the western hemisphere. by 1691, the population of indigenous americans had declined by 90-95 percent, or by around 130 million people."