There is circumstantial and scientific evidence of nepotism in Europe and USA, and among politicians, judges and other elites. Despite this, an access to positions of power in a liberal democracy is restricted in the sense that occupational following in the offices is subject to public scrutiny. There is a conflict between a personal obligation to promote one's kin and a public obligation to promote liberty. This public duty emerges from a duty to allow access to offices of power to those who have the misfortune of not being born as dynastic followers. It is based on John Rawls's original position which is a thought experiment establishing an impartial environment to detect chief principles adjudicating conflicts of moral doctrines, fairly. In it, the condition of impartiality is achieved by means which are found in this dissertation to be excessive. Its blanked ban on biases immolates even those biases which contribute to fairness, despite their partiality. When nepotism is partly considered an expression of altruism, it shows a capacity to increase cohesion, impede free-driving and improve economy. In order to preserve these virtues, an improved condition of impartiality is offered to enhance Rawls's theory and to classify instances of nepotism according to their effects on improving or hampering...