This paper aims to present a review of how project management has been addressed and developed through the years. This review has been undertaken by theoretical fusion with the management theory jungle first espoused by Koontz (1961;1980) then by articulating the research agenda in project management and the findings suggest the existence of classical project management, rethinking project management, brave new world and project studies groups within the research agenda. In addition, the schools of thought were reviewed as well and they are considered essential in management and project management because they help in deciding which school is the most relevant and useful for making decisions. This study will cover the various schools of project management and their relation to the schools of management. After that, the paper will provide a critical analysis of what has been discussed.