Introduction The world’s cultural traditions are significantly different and demonstrate the diversity of people, which is a positive aspect for the development of the world. However, some practices are outdated, harmful to people, and violate human rights. The Girl Not Bride organization fights against one such tradition of child marriage that harms the mental and physical health and development of thousands of young girls around the world. My interest in this topic is based on my belief that all people should have the right and freedom to choose their path, but children most often cannot influence their destiny and require help. Therefore, in this paper, I will present the Girls Not Bride organization that emerged as a result of social change in the culture of marriage and is the cause of it today. Girls Not Bribes as an Agent of Social change Girls Not Bribes was founded in 2011 by a group of independent global leaders and today operates through local and international organizations such as schools, educational, social, and health centers (“About us,” n.d.). The organization offers membership to all facilities that wish to join the movement. At the same time, anyone can donate directly to these members to support their work. Girls Not Bribes is an agent of social change as it changes the culture and perceptions of marriage in countries and families where child marriage is considered the norm. In addition, the instrument and consequence of this change is the improvement of the education of girls and women and their rights, which often limit countries with a tradition of child marriage. Girls Not Brides: Mission and Methods The Girls Not Brides’ mission is to end the tradition of child marriage by changing the population’s attitude towards this practice, which will increase girls’ opportunities for education, health, and career development. The main work methods are promoting the prohibition of child marriages in society through education of the population about its harm, providing funds and educational opportunities for children from families in need (“How we work,” n.d.). In addition, since many countries do not have laws against child marriage, the organization also contributes to the development of legal initiatives and advocacy campaigns. Analysis of the Change Analysis of the organization shows that the change to which its activities are directed can be attributed to several types of changes. First, the elimination of child marriages requires a shift in women’s and children’s roles in families, since such a tradition is caused by the attitude towards them as property but not as an individual. Secondly, this problem also requires a shift in the emphasis on the function of the family because child marriage is usually used to solve financial issues (Koski et al., 2017). The problem also affects the micro and macro levels, as it begins with a change in the perception of child marriage by individuals, who later require changes in the state, and, as a result, the practice is banned throughout the world. However, since the problem is widespread and difficult to solve due to cultural traditions and social issues, the change is long-term. The change was caused by a shift in the perception of child marriage in society. Just a century ago, early marriage was a necessity because women depended on their parents and then on their husbands financially and socially, since they had no rights. In additio