Hitler understood the demagogues' essential principle to teach or persuade is far more difficult than to stir emotion.

More than anyone else, Adolf Hitler completely understood the union between government propaganda and between - and advertising, that they were in some ways the same thing.

If you have a disease and suddenly start getting ads for cures for that disease and it's an embarrassing disease - all that kind of stuff it just gets into that zone of autonomy or privacy where you feel a sense of freedom to be who you want to be.

In the media, traditional media like print, we had boundaries. You know, we had spaces that ads didn't leave. They stayed where they were on the page. They didn't float around over the text. And we're kind of lost on the internet. We don't have any barriers. We have a demand for growth that is insistent.

Every time you click on a like button on another site, you've told Facebook that you're doing that. And so therefore advertisers know who their fan base is.

Now, he doesn't control the media, but Donald Trump has been incredibly successful in having his face appear everywhere. You cannot go a day without seeing that face somewhere maybe 10 times.

I do think the best thing for companies like Google and Facebook, if they are afraid of this ethical trap of advertising, is they should start letting people pay who want to pay and avoid some of the advertising.