Middle and upper class americans in the 1890s became concerned with the rising influence of a political philosophy that advocated for government ownership of many businesses and greater social justice for the working class.

Socialism

Explanation:

Socialism is a political philosophy which is contrast with capitalism. According to socialism, the economic and political system should be based on public ownership. The production and distribution activities are controlled by government and all the citizens should just rely on the arrangement made by government. Government will also determine the price for goods and services.  

A socialist strongly believe that a shared resources which is governed centrally can ensure a fairer distribution of goods and services and achieve an equitable society.

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i believe it would be capitalism