In “The Limits of Friendship,” Maria Konnikova goes into great detail about the Dunbar number and its relevance to our changing modern world that uses social media to enable connections. The Dunbar number suggests that there exists a “cognitive limit” to the number of personal social relationships a person can keep at a given time. Konnikova studies what this number may really mean, and if our ever-expanding social networks through social media have done anything to change the relevancy of it today.