How many dead children is "the best one we have come up with so far" worth?
>Western liberal states broadly have greater civil rights and have reduced poverty more than any other type of system in history
Except that of China, whom by embracing markets and capitalism, lifted more people out of poverty than the entire populations of the United States and Western Europe combined.
Make no mistake: Western liberalism isn't what lifts people out of poverty, capitalism does. It doesn't matter whether the capitalism is practiced by western liberal democracies or repressive authoritarian surveillance states - where capitalism goes, widespread increases in human wealth and quality of life follow.
That people could confuse this cause-effect relationship merely because western liberalism adopted capitalism earlier than the more authoritarian laggards only further proves "that government which governs least, governs best".
Less government = more freedom = less poverty.
More government = less freedom = more poverty.
Also, you're cherry-picking convenient examples while ignoring the inconvenient examples (Zapatistas, Rojava, various indigenous societies). The 1790s weren't even anarchist - they had revolutionary governments. The Terror was conducted BY a government, not in an absence of government.
Anarchist societies can maintain order and capitalism can create wealth under any political system. Individuals can murder, but states are the only entities to have ever committed genocide. The question isn't whether states do good things sometimes - it's whether any amount of good can justify establishing the prerequisite conditions for genocide to occur.
Is any amount of poverty reduction worth creating and maintaining the machinery that made Auschwitz possible, especially in a world where that poverty reduction doesn't actually require the existence of that machinery to begin with?
Keeping the state around for the stated purpose of reducing poverty is like keeping a loaded gun in a daycare to open juice boxes. Sure you can do it that way, but you also do not need the gun to do that, and having the gun there just introduces massive unnecessary risks.