We the human race thrived so much because of tools. Tools are the main differentiator in capabilities between humans and animals. Tools are not only physical things, these can be services we use(for e.g. internet, telephone, TV connection) or the knowledge and skills we acquire. If we look back at human evolution, we will find that our tools evolved faster than we did and these tools in turn gave direction to our further evolution. Interesting thing is that as we kept on bettering our tools, our physical(including brain) and mental strengths and capabilities went on diminishing. For e.g. if we compare the current human skeletal structure with just 1000 years older ancestors, it has downsized significantly. Same with muscle power, brain power and psychological state. In history we have many incidents of humans taking on fights with bulls, boars, hyenas and even tigers. That's because physically we were indeed capable of it. Today we cannot dare to take on even a dog with our bare
