Explain how US foreign policy can affect the average US citizen

Here are the reasons how US foreign policy can affect the average US citizen:

1) Globalization affects US domestic life. Everything that happens overseas affects citizen's life. The best example is European crisis.

2) All decisions in foreign policies have the consequences. The war in Iraq increased the national debt and interest payments.

3) US unique place in history. US government systematically invests in new technologies and competes with foreign countries. This competition is very important to develop their education and infrastructure.