Both Thomashefskys did much to shape the world of modern theatre from the follies to Broadway and gave a start to many actors, composers and producers who went on to start and own theaters and movie studios. Even the Gershwin brothers had their start with the Thomashefkys. They were also prominent in addressing controversial social issues of the day and in teaching the Greenhorns how to be Americans. They founded theaters and production companies, as well as publishing houses and many other successful business ventures.