What Happens When Propaganda Doesn't Work?

WWI must've been a tough sell in the parts of the United States which were dominated by German immigrants, plus the country still regarded foreign entanglements with great suspicion. A few years of heavy propaganda plus a false flag or two were required to drag the United States into the War.

Since that era, the mass societies of the western world have been shaped by mass media propaganda and public education/indoctrination to create a social order that's tied into methods of food production and industry and war. The methods of mass organization and tackling national level projects, like wars, space programs and various social causes are reflected in the microcosms of corporate endeavors.

The Internet is breaking down the effectiveness of propaganda, partly because there is so much of it spewing out all the time--all using the same ploys. The propaganda itself becomes an inoculation against propaganda.

So what happens when that all stops working and the shared delusions and dreams evaporate?