More input, as of May 2017! (via someone at Incline Media...thanks for the input! See this also in the blog comment at the bottom)-- The Charles F. Brown you're talking about here is one of my best friends and a musical mentor to me for many years, and here's the real inspiration behind this song:
Charlie was in charge of publishing for Word Records when it was in Waco TX, and in the early 70s he was working on what would become an industry-disrupting idea of his own - a collection of new music called Sing N Celebrate. As he was working on the layout of the book, there were several blank single pages throughout the book because of the way it was all coming together. And since he didn't want any blank pages, he wrote several songs expressly for the purpose of filling those blank pages in the book, one of which was "Common Love." Another one you might recognize was called "Part the Waters," one of Charlie's best-loved songs.
Charlie would say that inspiration comes in many forms, but often it's in the form of a deadline!