Hunter - gatherers lived 1.8 million years ago. Members of a nomadic people live chiefly by hunting, fishing, and harvesting lots of wild food that they had caught. Hunter-Gatherer rely mainly on domesticated species.
Agricultural Revolution was a period of technological improvement and increased crop productivity that happened in the 18th and the 19th in Europe.
We have improved a lot, we now have permanent housing as shown in the slide, we also have technology to help us find the answers we need. For example, we have computers, and proper beds, also we have a source of shelter, and lighting.