Why did it take money to make money during the period of rapid economic expansion after the Civil War What are the implications of this for the potential for social mobility?

During the period of rapid economic expansion after the Civil War, significant capital investment was required to develop infrastructure, industries, and businesses, meaning that those without financial resources struggled to enter the market. This reliance on money for investment created barriers to entry, limiting opportunities for social mobility, particularly for lower-income individuals and marginalized groups. Consequently, wealth became concentrated among those who already had capital, perpetuating economic inequality and reducing the chances for upward mobility for others. Ultimately, the cycle reinforced a socio-economic structure that favored the wealthy, hindering broader access to opportunities.