If you mean Russia, they had years of internal violence behind them. They had well established revolutionary movements and terror groups acting inside on top of it even before WWI. And the regime was weak and forced to do concessions already in run up to WWI and even weaker by end of it. They were doing reforms, too little too late, but they were doing them because internal pressure was strong for years.
That revolution did not came out of nowhere. Plus, the population was literally hungry and desperate to large extend. And plus, it was followed by major civil war of like 5 sides competing for power.
If you mean Russia, they had years of internal violence behind them. They had well established revolutionary movements and terror groups acting inside on top of it even before WWI. And the regime was weak and forced to do concessions already in run up to WWI and even weaker by end of it. They were doing reforms, too little too late, but they were doing them because internal pressure was strong for years.
That revolution did not came out of nowhere. Plus, the population was literally hungry and desperate to large extend. And plus, it was followed by major civil war of like 5 sides competing for power.