What led to russia's collapse in 1917

There were many factors that led to Russia's collapse in 1917. Among the most important ones were very strong and powerful social unrests that were happening due to bad and poor social conditions; not enough food and not enough work for people. Because of this they also didn't have enough money to buy food in the first place. Another was that the ruling Tsar at the time, together with his family, was a weak leader.