The next few decades can be claimed as the hinge of history due to two reasons, climate change and genetic engineering. There have been many wars and changes i

The next few decades can be claimed as the hinge of history due to two reasons, climate change and genetic engineering. There have been many wars and changes in the past, but now is the first time that our technology has basically reached worldwide geoengineering scale. We are fundamentally changing the climate of the entire world, that has never happened before in human history. Throughout all of human history, the human has not changed. If you somehow time traveled a human baby from 10k BC to present day, they would grow up and fit in with no issues. Now the very nature of what is human could change due to genetic engineering. Again, this has never happened before in human history.