Which prominent Scottish-American industrialist built the Carnegie Steel Company into the largest steel manufacturer in the world during the late 19th century, before dedicating his later life to massive philanthropic works, particularly establishing public libraries?

💡 Explanation:

Andrew Carnegie (1835–1919) was the magnate who led the enormous expansion of the American steel industry. After selling Carnegie Steel to J.P. Morgan in 1901, he focused on philanthropy, funding the establishment of over 2,500 public libraries worldwide.