Original sentence: By the mid-1930s, the Communist regime considered socialism to have been 'built', and the League adopted a new slogan: "Struggle against religion is a struggle for communism", communism being the next stage after socialism according to Marxist theory.It propagated atheism and scientific achievements, conducted so-called "individual work" (a method of sending atheist tutors to meet with individual believers to attempt to make them renounce their faith); most of the peasantry was unimpressed, and even the party apparatus regarded the League as meddling and inefficient.The League's slogan was "Struggle against religion is a struggle for socialism", which was meant to tie in their atheist views with the Communist drive to 'build Socialism'
Edited sentence: In the mid-1930s, socialism was mainly built in the USSR, and the League’s new slogan appeared: "Struggle against religion is a struggle for communism".It propagated atheism and scientific achievements, conducted "individual work" (a method of sending atheist tutors to meet with individual believers to convince them that gods do not exist); most of the peasantry was unimpressed, and even the party apparatus regarded the League as meddling and inefficient.The League's slogan was "Struggle against religion is a struggle for socialism", which was meant to tie in their atheist views with economy, politics, and culture