"Sometimes, it's better to light a flamethrower than to curse the darkness." Sir Terry Pratchett, Men at Arms.
"The greatest journey begins with a single step." Buddhist proverb.
No, I'm not endorsing the idea of sparking up a flamethrower and advancing on your favourite target of wrath. Really I'm not, those things are heavy. What I mean is, it's better to take action than talk and no matter how big the job or long the journey, it'll never be complete unless you start.
Take a look at this video, it's about 14 mins long so it's a good accompaniment to your coffee. This is an incredible teacher who saw an opportunity to help his kids and took it, and the knock-on affects of this man's actions have been huge. Enjoy.
As you can see in the video, it is possible to create change through your actions and examples. It is possible to positively affect enough people to make a difference. Learn to grow your own food and teach others to do the same. Convince your landlord, your principal, your local politician to see the economic benefits of fitting buildings with water catchment systems and green roofs. Look into starting or extending local CSA's and LETS. Spend what money you can in shops owned and operated in your community. Sit around the kitchen table with your neighbours and decide the most beautiful way to provide fresh, healthy food for all of your children.
Permaculture isn't about hiring lots of expensive machinery or using jargon that only club members can understand. It's about using the resources you have to fix the problems you face. Stephen Ritz managed it and I'll bet he hadn't a clue about Permaculture when he started. He saw an opportunity to make lives better and he took it. Be inspired. Take that first step and enjoy the ride.
And like he says, don't forget to stop and smell the flowers along the way.