Why do you think some people called Carnegie called a Robber Baron?

well... according to the wiki it says ....

"....He earned most of his fortune in the steel industry. In the 1870s, he founded the Carnegie Steel Company, a step which cemented his name as one of the "Captains of Industry". By the 1890s, the company was the largest and most profitable industrial enterprise in the world. Carnegie sold it in 1901 for $480 million to J.P. Morgan, who created U.S. Steel. Carnegie devoted the remainder of his life to large-scale philanthropy, with special emphasis on local libraries, world peace, education and scientific research. His life has often been referred to as a true "rags to riches" story...."

so I'm not sure why they call him that, the good thing is that I know why people call him the captain of industry

I gave you a definition of robber baron a few days ago. They used unethical or questionable practices in their businesses. The drove smaller companies out of business and underpaid and abused their workers.

http://en.wikipedia.org/wiki/Robber_baron_(industrialist)

Some people called Carnegie a Robber Baron because they believed that he built his wealth and power through ruthless means, exploiting his workers, and engaging in monopolistic practices. The term "Robber Baron" refers to industrialists and businessmen who became extremely wealthy during the late 19th century through unethical and often predatory business practices.

To understand why some people labeled Carnegie as a Robber Baron, it is important to examine the historical context of the time. During the late 19th century, the United States experienced rapid industrialization and the rise of powerful business tycoons. These individuals, like Carnegie, amassed enormous wealth and influence by dominating industries such as steel, oil, and railroads. However, their methods and behavior were often criticized for their negative impact on workers, smaller competitors, and society as a whole.

Carnegie's critics argue that he gained his wealth by low wages and harsh working conditions for his employees. He allegedly drove down wages, extended working hours, and disregarded workers' rights to maximize his profits. Additionally, Carnegie was accused of employing aggressive tactics to eliminate competition, such as predatory pricing and collusion, which ultimately led to the creation of monopolies.

The term "Robber Baron" suggests that Carnegie and people like him were exploiting the economy and society for personal gain without regard for the well-being of others. However, it is important to note that this term encompasses various industrialists of the time and is not exclusive to Carnegie alone.

While Carnegie's business practices may have been contentious, it is also important to acknowledge his philanthropic efforts later in life. After selling his steel business, he dedicated himself to charitable causes such as building libraries, promoting education, and supporting peace initiatives. This aspect of his legacy, along with his rags-to-riches story, often tempers the perception of him as solely a Robber Baron.