What were the causes of withdrawal of non cooperation movement explain?

Gandhiji called off the movement in February 1922 in the wake of the Chauri Chaura incident.

In Chauri Chaura, Uttar Pradesh, a violent mob set fire to a police station killing 22 policemen during a clash between the police and protesters of the movement.

Gandhiji called off the movement saying people were not ready for revolt against the government through ahimsa. A lot of leaders like Motilal Nehru and C R Das were against the suspension of the movement only due to sporadic incidents of violence.

Causes of withdrawal of the Non-cooperation Movement.  Due to the Chauri Chaura incident where 22 policemen were burnt alive, Mahatma Gandhi decided to withdraw the movement. He felt the movement was turning violent in many places and satyagrahis needed to be trained properly for mass movement.

c. wright mills's sociological imagination suggest investigating to explain this increase?