This is a video of someone presenting an unpopular, generally opposed idea. He does so with great skill, especially at the introduction. Notice how, in the first three minutes of the video, he summarizes the prevailing notion, explains it as a series of logical connections, and then provides a perspective that makes those logical connections unfathomable leaps. He's caught our attention and readied us to hear the rest of his case. Notice how long it takes him to say that what we think is wrong and how much force he brings to that statement. Something to consider the next time you face an unfriendly crowd.