It has failed in every form and guise previously tried - and the cost in deaths has run into many tens of millions to complement: bulging prisons, slave labour and all the basic freedoms so hard won over centuries.
Never be fooled by claims such as 'in our form of marxism - it will be different'.
Incidentally, I was given that claim face to face by leftist firebrand speaker Tariq Ali when I attended a meeting at Sheffield University back in the early 70s.