In this research the problem of liberty is considered in the context of religion as I am searching for an answer of the question if religion is not the main reason for limitation of freedom? My research is based on the philosophical essay of John S. Mill “On liberty”. An essential specification for this analysis is the fact that it is mainly interested in Christianity and to rather less extent, in the other religions. I am inclined to agree with the (...) critical opinion of Mill regarding religion and I am asking myself if religion is not the social-historical phenomenon which suppresses free thought, obliterates individuality in people and aspires to reigning greater masses of people as possible. And one more thing. Is it possible that to the final results of the influence on society’s life between religions and ideologies isput sign of equality? Isn’t it the free critical thought that is limited in both the cases and therefore society’s progress that is also limited? However inspiring with hope is the fact that such powerful ideological movements lack these days and the influence of religions is not as big as it was in previous periods of history. And – “thanks God”…. (shrink)