Carried out in 2017, the first aim of this study was to respond to the attacks commonly made on immigrants in France and Europe. Going against the grain of media shortcuts, this study showed to what extent immigration can be an opportunity and an added value for host countries. Over and above the comparison between benefits and detriments, my study suggests possible long-term solutions for welcoming migrants and confirms the possibility of their existence in distinct economic systems. In addition, I have chosen to pay particular attention to the dynamics of cooperation and solidarity that already exist and have proved economically viable in Europe. At a time when immigrants are being criticised and blamed, and when human rights are being flouted, I felt it was important to provide some answers to the accusations levelled at them.