Fine. Move the completion date on the wall out to about 2150 or so. That still acceptable to you?
What ever, the sooner the better. You know the Roman Empire may have survived had it got started on a wall of their own.
But then again, maybe not. The Romans were also facing serious problems with crooked politicians, general moral decadence, excessive reliance on foreigners for good and services, and a military scattered to distant territories instead of protecting their homeland.
Navigating the treacherous
waters of a liberal culture.