What is to be done? The Soviet Union has fallen and most remaining ML states have gone full revisionist and capitalist with the exception of a few holdouts, and even those are gradually edging towards revisionism. Labor unions have been or are in the process of being gutted and destroyed by neoliberalism and the radical left has lost much of its support among the working class without radical unions. The anarchist movement is fading into a pathetic LARP fest (certainly compared to what it used to be) with the possible exception of the Greek anarchist movement. At this point, first world ML parties are nothing more than irrelevant, dying social clubs for Trots and cultists (e.g. bob avakian). In the West, succdem movements led by politicians like Bernie, Mélenchon, and Corbyn might as well be the last serious remaining element of the "radical" left in terms of realistically gaining power.
The dreams of a successful third world rebellion are almost as bleak, and the "anti-imperialists" here, in the absence of a strong third world movement, have resorted to throwing support at completely non-leftist powers like Hezbollah and Assad simply because they oppose the United States. The leftist groups that are still active in the third world aren't exactly in any position to overthrow world capitalism, and many remaining guerrilla movements (such as the Maoists in the Philippines) are gradually fading under the pressure of imperialism.
On the other hand, modern material conditions are getting worse, especially for young people, and the left is seeing points of resurgence in some areas. There are tons of unemployed, alienated NEETs out there ripe for radicalization. There are lots of angry youth everywhere who can't find decent work, homes, and careers even despite craptons of education in the first world, and the third world has its own unemployment issues. And as a result, especially with the end of the Cold War fear of leftism, social democrats are soaring in popularity and labor struggles and strikes (even in Burgerstan) are becoming more prevalent in the West. But idpol from both liberals and the alt-right is drawing people away from the radical left and towards pointless squabbles over shit like online video game culture, and the online presence of the truly radical left is limited to a few small spots like the leftist boards on this site. New tech allows for new possibilities like cybernetic socialism in the future but also gives increased power and surveillance to reactionary states and corporations in the present.
When it comes to unstable third world areas like the Middle East, where shitty conditions could fuel leftist movements, angry, unemployed youth are just as likely to become refugees or join Hezbollah or obscure Islamist FSA factions than to form Maoist groups.
With all of this in mind, what should the left do now to work towards achieving socialism? Should we embrace the succdems out of sober realpolitik and pray that they will eventually guide a slow transition to socialism under the pressure of modern material conditions (economy, automation, unemployed and alienated NEETs)? Should we wait for a great economic collapse that will hopefully make 1917 viable again? Should we set trash cans on fire and organize tiny communized hipster enclaves away from capitalist authority like Exarchia or whatever because the rest of capitalist society is irredeemable? Do we volunteer in obscure, dying Maoist groups in the Third World in the hopes that our chaotic, warming world will soon provide an opportunity for those groups to rise again? Do we go full armchair (or edgy accelerationist) and assume that the material conditions will work themselves out without pointless, futile LARPing? Or do we create a whole new movement from scratch?
So, in your opinion, how should the radical left realistically work towards making socialism a reality, given the modern conditions of the 21st century?