Final answer:
The progressive movement's calls for government regulation of business were justified from their perspective, as they believed it would ensure fair competition and fair conditions for workers. Opponents feared that such regulation might lead to a powerful government that could seize control of businesses and property.
Step-by-step explanation:
The question asks whether the progressive movement's calls for government regulation of business were justified.
The Progressives believed that government intervention was necessary to ensure fair competition and fair conditions for workers.
They argued that by regulating corporate America, the government could prevent the rise of socialism and class warfare.
On the other hand, opponents feared that such intervention might lead to a powerful government that could seize control of businesses and property. Ultimately, whether the calls for regulation were justified or not depends on one's perspective and beliefs about the role of government in the economy.