Question

Which factor most greatly limited union growth at the end of the 19th century?

Answer 1

One of the greatest factors that hurt the growth of labor unions in the late 1800s was the Pullman Strike in 1894. The strike ended with federal troops killing over a dozen strikers and injuring many others. This event, in which federal troops unambiguously sided with the Pullman Company, hurt the cause of labor unions and made striking seem like a more dangerous thing to do. 

Answer 2

By  the  late  19th  century  the  workers  had  bad working  condition.they  were  used  to  be  payed  low  wages  thus  they could  not  be  able  for  them  to  support labor union.In  addition  many  workers  were  children who  could  not  be  able  to  defend  their  rights.