Bill Mollison, the founder of permaculture, set out looking for a deeper knowledge and traveled across continents visiting indigenous people and learning about the most successful farming methods used by them over hundreds and even thousands of years.
From this hands-on research he was able to formulate a number of principles based on a whole systems design where everything that is affected is evaluated before
any action is taken. It starts with the ethics of care for the earth, care for people and care for the future. He noted that working with
nature instead of against her increased the longevity and abundance in these natural systems. These principles now help us create a more resilient, holistic, permanent culture, which is how the word permaculture was formed.
Growing food using these principles is simple, does not require expensive machines or tools, and anyone can learn how to do it. Permaculture is about designing one's life to be more regenerative. This can be broken down into design projects; for instance, a permaculture landscape design would include fruit trees, edible landscaping, and gardens.
Using these regenerative gardening techniques, it's possible to grow enough food to be able to sell excess at farmers markets and other local outlets all while feeding your family really healthy and nutritious food.
A movie was made which gives a nice visual understanding of how permaculture helps the world:
The movie is Kiss the Ground, https://kissthegroundmovie.com