Humans create software, at least now. They are very complicated beings shaped by millions years of biological evolution. People have psychology, intellect, creativity, self-discipline, motivation, experience, knowledge, feelings, emotions, personality and many other characteristics. Multiply them on complexity of building a software system and you’ll receive almost unpredictable and unique situation for any software project. People are the main factor of software success or failure. Understanding people themselves and how they create software are the main topics of this blog.