Looking through an interesting post at Armed and Dangerous on the topic of the definitions of fascism, socialism, communism, and to a lesser extent, capitalism, I came to a conclusion which explains a number of things, primarily why lefties keep telling me that capitalism and fascism are the same. RTWT and don't skip the comments.
So the definitions of all ----isms is a socio-economic system in which harmony pervades the relationship between the governed and the governors, and happiness and prosperity are found everywhere. This seems to be the bedrock definition of all ----isms. To the extent that this happy state of affairs comes up short, the ---isms are obviously being implemented wrong, and someone is found to be at fault for this, and must be corrected/reeducated/arrested/eliminated. When the whole edifice collapses, it's then an example of the ----ism not being implemented correctly, or not "real ----ism".
Or as Robert Heinlein said:"Bad luck".
Goes a long ways toward defining why I went into engineering instead of the softer sciences since I have a lot more faith in the calculated breaking points of materials than I do in the durability of theories built on guesswork regarding human and/or divine nature.
Tangentially related: If you want to depress yourself* get up one spring morning to find a late cold snap has arrived with temps barely above freezing, settle down to read Indian Country by Schlichter, then periodically take a break from his dystopia to check the news.
*Don't know why anyone would want to unless you need some inspiration to sit down at the bench and run off another several hundred rounds of ammo.