Why did the Parisian commune, which put forward the idea of protecting social justice, fail?

The ideas put forward by the Paris Commune were mostly declarative in nature, not supported by action. For a long time, the leaders did not accept a specific program. The ideas did not touch upon the problems of the peasantry, so the peasants remained indifferent to the fate of the commune and did not support the revolution.

Another reason for the fall should be called isolation from other regions of France. In large industrial centers of the country, communist spontaneous uprisings were easily and quickly suppressed.

No measures were taken to organize a revolutionary army, so the commune could not defend itself.

These are, perhaps, the main reasons for the fall of the Paris Commune, despite the fact that the ideas of social justice put forward by it at that time were quite progressive and met the requirements of the majority of the people.