Or how to feed ourself with minimum effort and footprint: Permaculture (or natural farming). The logic and benefits of permaculture are so obvious that it is hard to understand why not everybody who is involved in agriculture has yet switched to this efficient and sustainable practice.
Three main components are: to go with the flow of your direct environment (use plants, bushes, trees etc. that need little help to flourish), focus on the quality of your earth (limit activities that degrade the earth such as ploughing) and use species that you do not need to plant again every year (at high labour and energy costs).
Mark Shepard has written an attractive book on this topic. See below for the dutch translation by Maranka Spoor en Lucas Brouns (two frontrunners of permaculture in the Netherlands).