WT state that the global flood that wiped everything away happened in 2370 BCE.
There's been a wealth of evidence from many quarters which prove that life continued as normal for civilizations during that time period.
Now Scotland adds to that body of evidence as detailed in this BBC report:
Key dates indicated by the study
- Orkney was probably first colonised in 3600 BC
- Settlement peaked in the period 3100-2900 BC
- There was a phase of decline 2800-2600 BC, measured by the number of stone houses in use
- Settlement resumed in 2600-2300 BC, and it could have been about this time that the Ring of Brodgar itself was erected.
The evidence keeps rolling in.