1) In 1943, Abraham​ Maslow published “A Theory​ of Human Motivation”  2) Douglas Mc Gregor published “The Human Side of Enterprise” in 1960 following Maslow's theory. 

YouTube Version: https://youtu.be/xLlg-km6kJo

Reference: 

http://lifestoogood.net/theory-theory-understanding-peoples-motivations-mcgregors-theory/

https://hbr.org/1970/05/beyond-theory-y

https://iwer.mit.edu/about/iwer-pioneers/douglas-m-mcgregor/

https://youtu.be/CXAzZRnJo2o

https://youtu.be/L0PKWTta7lU