The book is composed of several articles that explore complexity in its most varied aspects. The solution of contemporary problems, whatever they may be, requires a multifaceted vision, far beyond the reductionist perspective. The study of complex systems, however, does not have the capacity to offer ready answers to the challenges of humanity. On the contrary, it points to the increase in uncertainty, the need to control variables, and uncertainty. This does not mean, therefore, that we should simply ignore the social, economic, and political phenomena that are all around us. What this book demonstrates is the importance of knowledge being disseminated, and it is imperative that different sciences exchange ideas, theories, and breakthroughs.