Is the challenge 2 fold? One part is much more open, accountable, igalitarian democracy especially in the economy.
The second is much futher away. Socialist thinkers have yet to descibe an economic model for generating and sharing material wealth that looks like it might work. Most so called socialist societies seem to have failed both economically and politically. This maybe because of outside forces but I wouldn't want to defend that line for too long.
1. Hunters & gathers had primitive communism because it was the most effective thing to do and , as others have pointed out they used it all over the planet.
2. Farmers produced more wealth than they could often use, the excesses were traded, and a new kind of economic and political economy was created.
3. The Industrial Revoltion and capitalism go hand in hand just as the previous 2 systems did. Capitalism moves the great quantities if wealth about and uses it to create more things.
4. In each of these systems justice is never automatic. Working people had to fight for everything and the owners kept a lot.
5. But before this degenerates into a typical Marxist rant I return to the point I started with. If we recognise the injustices and environmental problems generated by capitalism, what economic model could take its place?
6. The way wealth is owned, created and moved about is central. The old Soviet Union clearly failed at making and sharing anything much. Most (all?) post colonial attempts seem to end in economic failure and political corruption.
7. It's essentail to organise and vote in elections but when people ask for more money or improved environmetal standards trans-national companies go elswhere and undermine and sometimes destroy democracy if they have to.
8. This is why we need to find and an economic model to replace capitalism
9. Perhaps this is like the workers wanting to take over the Jam factory only to find it has been closed and Jam is imported.