Proactive employee behaviour refers to the attempt to improve existing conditions in the workplace or create new ones, as well as actions to change one's work environment, interpersonal relationships and socialisation behaviour instead of passively adapting to it. This contributed volume explores the role of proactive behaviour in employer/employee relations and in the wider context of the organization and society. It includes a comprehensive section that aims to provide a broad and descriptive perspective on the concepts of proactive behaviour and the research landscape. It examines areas including mental health, emotional management, disadvantaged employees, gender and queer-based perspectives, changes and conflict, sustainability, and non-profit organizations. Although proactive behavior is a desired behavior in business life, individuals who exhibit proactive behavior in the workplace can experience difficulties. For this reason, blind spots and hurdles that surround proactive behavior are also explored in this book. Examined in the light of current events, trends and the latest research, this book is intended to be a comprehensive guide on the positive and negative organizational behavior issues associated with proactive behavior. It will be of great interest to academics and students, as well as managers and all those with a wider interest in organizational behaviour.