The debates about the rights of the future generations have risen significantly in the last decade. The more attention we give to the question, the larger the number of new issues which emerge. As an example, the right to a healthy environment or the rights of the unborn can be mentioned. The aim of the study is to examine this question in connection with constitutions. The constitutional level could significantly affect the possibilities of the future generations. The theory of intergenerational justice is examined in relation to the main topic. The analysis of the population pyramid of the Brexit voters is mentioned as an example of a possible intergenerational injustice.