Are you an optimist? And do you work in an organisation where politics is rife?
Have you been assisted up by the 'honest advice' of a trusted colleague only to later realise that the information was designed to subvert your goals or team?
Why do some people actively work to sabotage projects when we are all supposed to be on the same side? Frustrated ambition? Jealousy? A natural tendancy to do evil?
Interesting questions. And I don't have the answer. But there is an opera on the topic. (And a cartoon.)