I'm certainly no expert. But, of course, I have a few ideas after all this time.
While I haven't had extensive, formal, academic training on the subject; I do have an understanding about the essentials or the ingredients necessary for community development and renewal to occur.
Here's a brief list of essentials:
Of course, there are other essential factors to bring to the process, but, in my view, nothing happens without these five building blocks of community development.