Good idea but it can't work in the real world.
No community can stay isolated forever.share
Why is it a good idea? It didn’t work out so well in the movie, and in real life I doubt it would work out well either.share
That's not exactly true. You'll remember that at the end of the movie they conclude that they still believe in the place and in their vision for it and will continue the experiment.
It may have not worked out perfectly, but it was still working out well-enough.
I saw it a long time ago, so my memory is fuzzy. I thought the whole idea was they had to invent those scary monsters to keep people from leaving.share
They did. And near the end William Hurt's character says that Noah's death "has made our stories real." By dying, he made the danger of the woods real for the younger folk who still didn't know what was going on. Remember that the secret was only revealed to Ivy.share
Apparently, it worked for many years.
With the proper conditions and resources it is possible for any indefinite period of time until it is not, just like most other conditions.
In the modern world it's probably true. However, if they were able to keep the land perpetually and also keep the villagers convinced that the woods were a very dangerous place, they could keep it going for the foreseeable future.
I wouldn't mind living in an isolated community that was based on the 19th century, at least for a while.