Creativity is the ability of a person or group to make something new and useful or valuable, or the process of making something new and useful or valuable. It happens in all areas of life - science, art, literature and music. As a personal ability it is very difficult to measure. The reason is that we don't understand the mental processes that help some people be more creative than others. Judging what is creative is also controversial. Some people say only things which are historically new are creative, while other people say that if it is new for the creator and the people around them, then it is also creativity.