It's also the most productive economic system ever tried.

I think whether this is true highly depends on the definition of productivity and circumstances.

What definition of productivity are we applying here? Capitalism sure is great at inflating useless statistics. It also seems to be decent for actually valuable products and services. However, depending on what you take into account, it's not so clear that it's the superior system.

Furthermore, there have been several cases of socialist governments improving the quality of life at a rate never seen in capitalist countries. Almost completely eradicating illiteracy in less than a year (Cuba). Or vaccinating half the population in a few months (Burkina Faso). Of course, those governments are rare and don't last long thanks to the CIA.

Personally I'd say the most immediate solution - or more accurately, improvement - is to mix our current capitalist dystopia with as much socialist policies as possible. Many countries in the EU are doing thay and it seems to be working pretty well. Let's just copy and build on that, then worry about the next steps.

French-style.

So transferring property and land from private and semi-state actors to rich speculators for pennies on the dollar? The French Revolution wasn't very notable on the wealth redistribution front; if anything it made the rich even richer.