Permaculture is a science-based ethical design system used to answer the all encompassing question:

“How do we live sustainably?”

Founded in three ethics:  Earth Care, People Care and Fair Share practitioners of permaculture use nature inspired design with tools and methods based in science, engineering, agriculture, finances, community building to create sustainable regenerative human habitat. This design system uses organic agriculture, urban farming, regenerative design, and many other ways of knowing to teach and provide a practical framework for individuals to take responsibility for themselves, their children and their community.

An article by Javan for Urban Garden Magazine published in the UK, US and Canada.
This is an excellent first read for those just getting into Permaculture looking for a concise summary.

Read it here