We may want to prune trees for a variety of reasons. Trees have done very well on their own for a very long time, but we want to live with them in a residential environment and that takes management. Safety, beauty, plant health and structural training are standard tree centered goals. We may need to manage trees around buildings or retain a priceless vista.All these considerations require pruning to smooth that interface between people and trees. Helping us coexist with benefits for both sides. That is our goal.