Sorry chaps but in many decades of experience ...
The best managers are 'born', they are naturals ..... teach someone to 'manage' ? Well unfortunately there is no manual for handling people, you got it, or you ain't .. Simple as that.
Are people skills not one of the hinge pins of a business ? One buys from them .. One utilises them in converting raw materials ... one sells to them .. the common thread ? people ! Are they not all pretty damn different !!
P