Getting Promoted At All Cost, Would you snitch on your co-worker to get Rewarded?

How important is getting a promotion for your good work and dedication to the job you are employed to do? Would you say it's a must to be promoted by any means possible or even if not deserved or you think God's time is the best for you. Why would people create a displeasing atmosphere for humans of same flesh and feelings just at the detriment of the others comfort.

Now the question is passed to you, Would you snitch on your co-worker in exchange for promotion?