The 5th millennium BC is a really long time ago, about 7,000 to 6,000 years ago! People back then didn't have phones, computers or even electricity. They lived in very different ways than we do now.
At this time, many groups of humans were starting to settle down and farm the land instead of constantly moving around like nomads. They figured out how to plant seeds and grow their own food which made life easier. In fact, this was the beginning of what we call the agricultural revolution!
This was also the time when people started to create villages or small towns instead of just living in groups. They built houses out of materials like mud, straw and wood. They also started to use animals for work, like using cows to plow their fields.
It's fascinating to think about how far back in time the 5th millennium BC is and how different life was back then. But humans started to work together and become more creative, which helped them develop new tools, like pottery and metalworking, and ultimately led them to the societies we have today!