The basic definition of an organization is a social unit of people assembled together to achieve and pursue common goals and objectives through a division of labour. All organizations have management structures that define relationships between different individuals in the organization accordingly (Business Dictionary, 2013). Over the years there have been very many theories on how people in organizations relate to each other and the management aspects and functions of the organizations. This report, therefore, analyses the different organizational theories in the 21st century in relation to the subordination of people in the organization and its systems. In the 20th century, business management was categorized into six main groups: – human resource management, operations management, strategic management, marketing management, financial management and information technology management. Management was seen as a profession on its own. In the 21st century, management theories cannot be subdivided into the same categories as in the 20th century. Since more processes operate simultaneously and involve several categories (Brown & May 2012). The organizations now think in terms of various tasks and processes in order to achieve overall organizational goals. Non-profit organizations also have there owned management theories which are public administration, public management and educational management. Many of the assumptions made in the 20th century have been criticized by business ethics, critical management studies and anti-corporate activism (Griffin, 2010).