Modern organizations are global entities with employees working at home ,in offices ,retail outlets ,service centers or manufacturing plants ,scattered throughout the world.Organisations such as BMW ,Apple ,Microsoft ,Goldman Sachs and many others with complex systems are challenging their employees on a global scale.

Although new methods of managing employees are needed to keep pace as organizations ,business environment and technologies change ,we must not forget the way in which management was practiced over the decades. This is because management as we know it today is built on managerial practices of the past.

In the context of the above statement and to understand contemporary management ,describe and explain the evolution of the various management theories from 1870 to 2020 onwards. In your response you need to ensure that you cover all the main viewpoints i.e., Bureaucratic Management .Scientific Management, Administrative Management, Human Relations ,Classical Management to name a few and to provide an in-depth comprehensive analysis.