When "Modern Management Theory" was born?

I believe it was born after the1950's and became noticeable by1960.

I agreed to all but In practical the TODAY'S MODERN MANAGEMENT THEORY came into existence after the intense use of internet and technology. 

The year that the modern management theory was born was1911. This year was the year that Frederick Winslow Taylor published his book Principles of Scientific Management, where he describes the theory of scientific management which is the use of the scientific method to define the “one best way” for a job to be done. Taylor is known as the father of scientific management. He was a mechanical engineer with a Quaker Puritan background and was appalled at the inefficiency of workers. Employees used different techniques to do the same job. Taylor set out to correct the situation by applying the scientific method to jobs on the shop floor.

Another associate of Taylor was an engineer named Henry L. Gantt. He extended some of Taylor's original ideas and added a few of his own. For example, Gantt devised an incentive system that gave workers a nonus for completing their jobs in less time than the allowed standard. He also introduced a bonus for foremen to be paid for each worker who made the standard plus an extra bonus if all the workers under the foreman made it.

Gantt is most noted for creating a graphic bar chart that could be used by managers as a scheduling device for planning and controlling work.

The year that the modern management theory was born was1911. This year was the year that Frederick Winslow Taylor published his book Principles of Scientific Management, where he describes the theory of scientific management which is the use of the scientific method to define the “one best way” a job to be done. 

I believe in the beginning of 1969 when the PMI founded. You can learn more about PMI by click into http://www.pmi.org/About-Us.aspx

I believe it was sometime in the begin1900s where they started to focus not only on the financial relationship between employers and employees but also other issues that are related the work organization. It focuses on issues like: structure, authority, Skills, Administration, Human interaction. Later in the1950's it resulted in terms like centralization, chain of command, hierarchy, ...

Chanakyan's (350-283 BC) 'Arthasasthram' gives an insight into Rajaneethi (this can be construed as Corporate Governance or Strategic Management in today's organizational context). A small excerpt loosely translated to English is provided below;

I would like to share with you the following:

Modern Management Theory was born with Henri Fayal who is well regarded as the father of the modern management theory

The first important Fayal's work on administration is his classic Administration Industrielle Générale (1916)

Henri Fayal rose into prominent in the field of management . It is a pity that the original "administration" was translated into English as "Management" and not admnistration

In1921 Fayal awarded a nobel prise for his research in metallurgy