While T.E.D.'s summary of Union Nationale and Social Credit politics of the 1930's is more than adequate, one must take the entire map with a grain of salt. Ignoring the rough style, there are numerous egregious errors:
French and Spanish Morocco are conflated and combined, as are Algeria and Tunisia. However one might choose to rate French Morocco and ...
That looks to me a lot like a map of (in the instance of the Gray areas) where there were active independence movements going on, particularly with far-right party backing.
This province has always effectively been a French-speaking enclave in a largely English-speaking country. As such, there's always been a Quebec Nationalist element within the ...
The main purpose is – per caption – to illustrate the varying degrees of censorship:
Dictatorial Control of the Agencies of Public Communication
Varying Degrees of Control, Censorship and Intimidation
Relative Freedom from Official Supervision
For Quebec, no definitive solution seems to be known. But there are convincing hypotheses out there: