The slaves in Egypt were usaully brought into slavery because of debt troubles, so they sold themselves to escape the poverty. There is still a hge debate going on if it was actaul slaves who built the pyramids or free Egyptians themselves. Historians have been arguing over this topic for years. Another thing that they often argue about is if they were “slaves” or “servants”.
In modern day, the Egyptians slaves have made their presence known: the pyramids. It is sometimes considered that everyone who lived under the pharoahs power was considered a slave. Without all of the slaves in early Egypt, they wouldn’t have been half as powerful as they were, and we probably wouldn’t be learning much about Egypt if there was no slaves. They are the roots of the tree and it is what kept Egypt powerful for so long.