This book is based on a documentary research that attempts to examine the discussion on the importance of method, its complementarity and validity of the social sciences versus the natural sciences for the generation of knowledge. On the other hand, it attempts to show the scope of the polemics and debates related to the pertinence, validity and reliability of research methods in the epistemological and paradigmatic context of the period in question. The concise nature of the text and the dissertation itself does not detract from the importance of each of the moments that delineated the content in its generality; each discursive space invites reflection in the context of scientific research when it comes to methodology or methodology. In any case, the application of complementarity can be conjugated for the welfare of the human being in a world of local and global complexity.