This chapter presents an overview of evolutionary algorithms explaining the main algorithms, and showing how all evolutionary algorithms are fundamentally the same. Evolutionary computation is all about search. In computer science and in artificial intelligence, when we use a search algorithm, we define a computational problem in terms of a search space, which can be viewed as a massive collection of potential solutions to the problem. Any position, or point, in the search space defines a particular solution, and the process of search can be viewed as the task of navigating that space. The chapter then defines and describes creative evolutionary systems, explaining why they were developed and how user interaction and changes of representation can expand the capabilities of evolution. The chapter also explores whether a creative evolutionary system can be said to actually work creatively. This chapter provides a mere introduction to the diversity of techniques that fall under the heading of creative evolutionary systems.