I do understand the impulse to gather up your family and closest friends and head for a deserted island where you rebuild civilization in your own image. After all, it's pretty clear that the world isn't going to do what you want, so why shouldn't you withdraw? The problems are huge; you are tiny. What's the point of doing anything when what you do is a dust mote in a tornado?
A lot of people feel the same as you do. They do. You can find other motes out there, tiny particles who have your faith, morals, and ideas. You can find those people and join up. You can become a fortress. Or a storm. I don't know.
The only thing I do know is that if we do nothing, then nothing will be done. Up to us.