What are the reasons for the first revolution in Russia?

The first Russian revolution, which took place in 1905-1907, had a number of reasons:
1. Bloody Sunday.
2. The very difficult situation of workers at enterprises (long working hours and low wages).
3. The need for an immediate solution to the agrarian question (transfer of land to peasants on the basis of private property rights).
4. Loss of Russia in the Russo-Japanese War.
5. The struggle of society against the autocracy (the need to provide the most important democratic freedoms to the population).