Becoming a family leader is fast and easy; it requires starting an organized group with a consensual commitment under the same roof, either with a biological parenting relation or without one. Furthermore, the modern anthropologist theory (2019) sees 'the new family' as a group of human beings with kinship ties that organize themselves in order to manage their economic resources together and achieve their daily basic needs. However, becoming a successful leader of such a family group is a challenge, depending on how well we understand what the administration of human beings means and how it works. This book is a scientific investigation of what families need to be successful as an organized group. It explains how applying the scientific theories of organizational psychology and administrative and scientific management to one's family can increase its functionality and productivity both inside and outside of the household. It also offers new insights into what organizational psychology and administrative scientific tools are and how these can be useful to the family during their daily organizational management.