In this webinar, twelve years of research into differences in Wechsler FSIQ scores between Whites, African Americans, and Hispanics are summarized for WISC-V, WAIS-IV, and WISC-IV both before and after controlling for socioeconomic status. The data presented will show that SES accounts for more of the difference with children than adults, and Hispanics than African Americans. The presenter will explain that cognitively enriching environments stimulate intellectual growth and development while cognitively impoverishing environments inhibit intellectual development. In addition, compelling data will be presented showing that SES is unequally distributed across racial / ethnic groups, and this intersectionality of class and environmental opportunity is a matter of social justice.