Men. Particularly chauvinistic male pigs.
It's amazing STILL how difficult it is for a woman to advance in a male dominated career.
Case in point: when I started my career with a particular Company, the man who was my local trainer, only gave me minimum training. He didn't want a woman to 'know' more about the job than him! He kept his work knowledge as a 'guarded secret'!
That all changed when I went to H.O. for two weeks' training. I returned 'triumphant' having topped my Course, ahead of 14 others'!
Fast forward 30odd years, & I met up with him again. I was with the same Company, he'd left many years' before. The position I held at that time, was way beyond what he'd EVER held!
Got to love Karma!
Women are held back terribly by leaving to have babies', & rear them.
They can NEVER 'catch-up' in any way, shape or form, to the time, & knowledge accruance that has been lost by doing that.
Life's certainly not fair, to the female gender.