Final answer:
J.P. Morgan played a major role in holding the economic system together with his banking and business practices.
Step-by-step explanation:
The titan of industry who played a major role in holding the economic system together with his banking and business practices was J.P. Morgan. He was a prominent American financier and banker during the late 19th and early 20th century. Morgan's business practices, such as consolidating industrial firms and providing capital for infrastructure projects, greatly contributed to the stability and growth of the American economy at that time.
Learn more about J.P. Morgan