In this volume of a series of books, we look at the themes that affect everyone. Mathematics can be complicated and difficult to understand, and by using practical examples I have tried to show the simple principles of maths. Sustainability, history, science and conservation have all been linked together to try and make sense of the world. Future volumes will expand these themes, like a spiders web we will try and make sense of a complicated place. In fact, I have merely stood on the shoulders of giants to get a clearer view of the world.