In my most recent class at Farmacy Herbs, we watched a video called Herbal Actions where English herbalist David Hoffmann explains the various actions of herbs (what they do in the body). David is clearly an extremely experienced herbalist and does a fantastic job explaining the relationship between pharmacology and herbalism.
This video prompted me to explore more of his teachings and I discovered one of his talks entitled A Call to Herbs: From Rhizotomoi to Radicle (in 3 parts on YouTube). It is a great introduction to herbal healing; David paints an informative picture of herbalism in the larger context of life and human history. Describing himself as a “recovering scientist”, but clearly not shy about his “tree hugger” tendencies, the video is both funny and fascinating.