The basic ground breaking conceptual innovation is - "self serve". The innovations with respect to tools - either support or serve that basic need. All hygien

The basic ground breaking conceptual innovation is - "self serve". The innovations with respect to tools - either support or serve that basic need. All hygiene tools - Nail cutters, Contact Lenses, tooth pick, soap, tooth brush, shaving blade may fall in this category. If we step little outside - I feel bicycle is one of the biggest innovation which triggered modern day - self serve - without depending on/troubling animals.