Mcgregor invented the world famous 2 models for motivation which are applied and accepted all over the world.

"X" theory 

"y" theory

X theory generally indicates motivate through frightening which consist of negative actions/punishment, strict behaviour, monitoring and supervision and autocratic atmosphere to get the job done by the human resources if needed. Basically applying pressure or pressurizing others to do work or leave

On the other hand,

Y theory  is the opposite one refers to positive motivation which includes promotion, bonus, applause,incentives,recreation encouragement and opportunities to given to increase one's self development and self actualization etc.