Through this final paper, two separate concepts are addressed, namely religion and family. The paper primarily explains what religion is, how it originated, what its origins are and how it has evolved over time. Religion has had great influences in society over time, and through this final paper it was described what its influences were before on society and what they are today. Family is another term addressed through this paper. A family is a community that, just like religion, has changed over time and society, ie it has changed its form, structure, definition, etc. It explains what the family was like before and what it is like today and what the relationship of members within the family is today. There is a great connection between the concepts of family and religion, and this is exactly the main part of this final paper, ie to explain the connection between these two concepts. The paper explains the influence of religion on the development of the family in the society of the Republic of Croatia and describes how religion affects society. The whole paper is imbued with comparisons of the earlier way of life with today's and comparisons of the earlier understanding of the concepts of religion and family. The influence of religion on the development of the family in the Republic of Croatia is clearly described and specified, ie it is clear whether there is an influence of religion and how religion influenced the development of the family earlier and how religion (Catholicism) affects families in Croatia today.