Butterflies?
As founder and chief instructor of Defender Solutions, I have dedicated the majority of my adult life to aquiring the skills and knowledge necessary to protect myself and others.
During this personal discovery process I've learned there are thousands of techniques, skills, responses. as well as hundreds of philosophies and disciplines that individually are effective. They all merit exploration and mastery but in the totality of things they are just the index cards of a vast Self-Defense Library.