Why did the sumerians civilization disappear?

The Sumerian civilization gradually declined due to a combination of factors, including environmental changes, such as salinization of soil from irrigation practices, which led to agricultural decline. Additionally, the rise of neighboring powers, such as the Akkadians and later the Babylonians, contributed to their political fragmentation and loss of autonomy. Over time, the Sumerians' cultural and linguistic identity merged with these emerging civilizations, leading to their eventual disappearance as a distinct civilization.