What’s the difference between race, ethnicity, and nationality? Let’s get Smarter in Seconds about each one and then put it all together with me as an example. For extra credit you can comment with yours too! Race: Race is a system that categorizes people based on human differences like skin tone, hair texture, facial features, etc. and ranks those differences based on social and political hierarchies that were invented over the past 600 years for the purpose of racism—beliefs and practices that