With these two examples refering to Lakatos practical life during the periods before and after 1956, we clearly see that Lakatos should be considered a man of critical rationality throughout his life. Though the critical rationality activated apparently an aura of the Popperian influence, Lakatos philosophy undoubtedly went through a process which is wider in contents and traditions than a simple and faithful follower of falsificationism. Popper certainly has been an influential figure in fortifying Lakatos critical rationality, but this attribution would not be enough if the designated rationality remains in the realm of theoretical realm. At lease, with the strees on practical concerns, a full understanding of MSRP would not be likely unless the relationship between the theoretical and practical rationality is taken into account. this account explains also the reason why Ropolyi holds firm that although Lakatos is reputed for being a methodologist of research programmes, an essential part of this methodology comes to be in line with his reflections established on the previous political practices. The consequence of Lakatos reflections was his determination to submit everything to critical examination. With regard to this, the confusion Lakatos creates is indeed too rich to be interpreted by resorting to any single viewpoint, let alone a theoretical one. A proper interpretation of Lakatos' philosophy could not be achieved unless he is also taken into account as a philosopher of political practices. The unity of theory and practice leading the way to progress is fully exposed by Ropolyi, though not necessarily refered to the Marxist way of thinking.