I don't really have optimism.

i just know what is going to happen.
Know the technologies that are coming, and their ramifications.

I see "Escape From LA/NY" as real, but it has to do more with lack of food and gas, then in actual wall. Although there will probably be UN soldiers involved.

The VAXXX deaths
The starvation deaths
The freezing deaths.

There are so many in the near future.
It makes me very sad.