Pride

 If you want to find out how proud you are the easiest way is to ask yourself, ‘How much do I dislike it when other people snub me, or refuse to take any notice of me, or patronize me, or show off?’ The point is that each person’s pride is in competition with everyone else’s pride.

Two of a trade never agree. 

Now what you want to get clear is that Pride is essentially competitive—is competitive by its very nature— while the other vices are competitive only, so to speak, by accident. 

It is the comparison that makes you proud: the pleasure of being above the rest.
Once the element of competition has gone, pride has gone. 

Nearly all those evils in the world which people put down to greed or selfishness are really far more the result of Pride.

C. S. Lewis