I fully agree with the first part. Countries with already developed industry and trade got the boost, and that's the major reason for the large difference in development between Underdeveloped and Developed nations.
If you remove socialist countries, poverty has gone up in the last century
I don't get it. Remove in what way? Too vague to carry any meaning.
If you mean their political, economic, and ideological impact on surrounding nations then yeah, obviously. But the socialist countries themselves had to adopt some form of capitalism to continue to grow economically (see: china). The countries that didn't move away from central planning eventually collapsed (eg. USSR*).
*I understand how the cause of the USSR's collapse is not soley the inefficiency of central planning, but even if the country was allowed to continue unimpeded, it would have collapsed because of that one reason.
They do, to a certain extent. Once an economy begins to grow more and more complex, the intensity of calculations needed increases proportionally (edit: proportional may not be the right word here).
A large part of the USSR's workforce was dedicated to economic planning at the time of its collapse, and it was projected to reach 50% by the 2000s.
They intended to solve this with computers, but there's reasons this wouldn't have worked:
A: Economic calculation involves NP-Hard problems, where the complexity can increase out of nowhere.
If you needed to perform 1600 calculations one day, next week the number needed could jump to 36000. (NP-Hard problems are also common in route determination programs used by delivery apps to devise optimum routes. If you increase the number of locations from 10 to 11, the computations needed to calculate an optimum route increases staggeringly, and it keeps getting worse the more complex you make it.)
B: Making the economy more complex makes the calculations needed more-than-exponentially extra intensive and numerous. If you introduce computers into the mix, more people are free to do other things and make the economy even more complex. It's a really fast vicious cycle that doesn't end well.
And in all of this, I haven't even mentioned the corruption involved in bureaucracy