I'm not sure if this has been addressed here before, so I figured I might as well try my hand at it:
What if the May 1968 labor and student movement in Paris had not been dispersed? More importantly, what if it had been successful? Surely, it would have had immense consequences, both domestically in France, and globally. 1968 was a year full of protests and disturbances, especially student centered ones (look at South America at the time, and other European nations, not to mention the United States).
Here's my idea:
Let's say that the movement is successful and spawns a national revolution (not too out of the question, considering that other cities in France were experiencing similar situations, thought to a lesser degree, such as in Lyon).
The labor unions and French Communist Party attempt to bargain with the workers and dissuade them from striking, just as they did in OT. However, instead of eventually being successful, they are not. Instead, a series of firey pamphlets from the student-held Sorbonne soon begin circling around Paris, accusing the unions of conspiracy with President de Gualle. Popular opinion towards them soon turns violent, and the FCP and unions are forced to back down; the Guallists loose a useful ally, and soon the people's hold over the capital becomes more secure.
Meanwhile, throughout Paris, workers cooperatively manage factories, students universities, etc. The situation manages to inspire workers and students throughout France, and many other cities experience similar revolutionary situations.
In Paris, the call of the anarchists to carry the protests further, to revolution and complete overthrow of the state (instead of just the overthrow of the Gaullist government) soon catches on, as millions of workers find themselves newly empowered by their collective management of their industries.
And, we essentially have the beginings of anarchist revolution...
What does everyone think?