Why did the popularity of communism increase during the 1930s

Many of the struggles in which Communists had played a leading role in the 1920s had ended in defeat. The 1926 Patterson, New Jersey, silk strike and the Gastonia, North Carolina, mill strike had been crushed. Sacco and Vanzetti died in the electric chair in 1927.But Communists, strengthened by both the world movement of which they were a part and a political structure that united them, kept on coming and learning from the defeats.Many working people on factories and farms as well as professional people, journalists, teachers, writers, and artists who had participated in these struggles learned to respect Communists for both their words and their deeds, for their courage and commitment.

Explanation:

the first forms of writing came from them in the form of pictographs around 3100 bc.