Civilizations that Disappeared

I am making a list of civilizations that vanished from Earth and from historical records.  We can then discuss whichever ones we want to.  Feel free to add to this list.


The Mayans
The Khmer empire
The Indus civilization
Easter Island people
Çatalhöyük
The Mississippians
Catalhöyük
Cahokia
Göbekli Tepe
Angkor
The Turquoise Mountain People
The Olmec
The Clovis
Mycenaeans
Rapa Nui
Aksumite Empire
The Cucuteni-Trypillian People
Nabta Playa
Minoans
The Harappan
Silla
The Nabateans
The Sanxingdui
Moche
The Sea Peoples