Around 8,000 BCE, people start agriculture (growing crops and raising animals for food). Early farmers worked hard with only their hands and feet. Being a farmer at that time wasn't easy.
UGH!!! So much work.......Oww......My back....My hands.....this is so hard......UGH!
At 6000 BCE, simple primitive farming becomes more advanced. With the invention of the cart, farmers can carry stuff back and forth easily. The sickle, which is a blade that cut grasses like wheat with no problem also made life easier. But best of all were irrigation canals. They made the soil more fertile, so humans had better harvests.
Ahhhh..... So much easier!!!!! Wait! Why am I still alive??
At 6000 BCE, humans build a surplus of food. Surplus means extra. Due to new technology like carts, sickles, and irrigation, farmers were able to achieve a surplus of food.
You have food idiot!
I need food.
At 5500 BCE, people start specializing in different fields. Due to the surplus, not everyone has to be a farmer anymore. People start things like iron making, carving, tool making.
Around 5500 BCE, now that people live in one place,people finally realize that homes can be upgraded. This leads to the mud-brick house.
At 5500 BCE, there is a huge population increase. Due to the new more permanent homes, people no longer have to move often. This leads to bigger families because they are easier to have. This leads to a population increase.