The United States is a yin-yang balance between Capitalism and Socialism. The primary effect of our many socialist programs and policies is to provide consumer protections and a system of checks and balances (i.e., oversight or regulations) that prevent bottomless-pit GREED from becoming the norm.
Some of America's most cherished socialist systems include, but are not limited to, the following: the U.S. Post Office, our military, the VA medical system, police and firefighters, our public schools and colleges, highways and roadways, national parks, our libraries, bridges and tunnels, etc. We also have agencies within our government, such as the FDA (food and drug safety); OSHA (worker safety while on the job), FAA (flight safety); the Department of Education, which established national standards that keep our school curriculae competitive with other nations' schools around the world as well as across state lines; etc.
Hope this helps you with your project. The general rule of thumb is that Capitalism without the balance of Socialism causes downfall due to rampant greed and corruption. Socialism without the impetus of Capitalism can lead to downfall through stagnation. The two work hand-in-hand to maintain a balanced and civilized society. Republican right-wingers and Libertarians tend to push too hard for ALL CAPITALISM; Democratic left-wingers (i.e., "bleeding heart" Liberals) tend to push too hard for social programs that may produce dependency. The CENTRIST or PROGRESSIVE or MODERATE stances have historically worked the BEST for our nation's strength, safety, and prosperity.