and include a variety of different studies conducted over the past 20 years. Additionally, this article will review the existing literature and discuss the contemporary issues of trafficking discussed within it. This document also aims to discuss the current existing research and note the research gaps within them so that we can improve our practices and policies on human trafficking in the United States. After a brief summary of the exact methods of how the studies were selected, the rest of the review will look at the ten selected quantitative studies and what they suggest in them. So within this article the literature will show and discuss what possible factors in a country lead to human trafficking, how and why these offenders commit this specific crime, what are the research gaps within the literature and how we can possibly solve this problem.