As a eugenicist, Grant was responsible for one of the most notorious works of scientific racism, and played an active role in crafting strong immigration restriction and anti-miscegenation laws in the United States.
Sebagai eugenik, Grant bertanggung jawab terhadap salah satu karya rasisme saintifik paling terkenal, dan memainkan peran akting dalam perancangan penolakan imigrasi dan hukum anti-miskegenasi di Amerika Serikat.