"Unrelated individuals" refers to people who do not share any biological or family connection with each other. They are not related by blood or marriage. Full definition
This is the first study to compare genetic risk for mental illness with levels of substance involvement across a large sample of unrelated individuals. (sciencedaily.com)
Domestic violence charges can arise when a physically, emotionally or psychologically abuse event occurs between spouses, parents and children, or even unrelated individuals sharing the same home. (rms-law.com)
Nevertheless, the assumption of mutually unrelated individuals each pursuing self - interest at the expense of others tells us much about their understanding of human beings. (religion-online.org)