This document introduces a managerial marketing course and discusses the concept of "flatteners" as described by Thomas Friedman. It provides an overview of 10 flatteners that have contributed to the flattening of the global playing field since around 2000, including the fall of the Berlin Wall, the rise of the internet, workflow software, open sourcing, outsourcing, offshoring, supply chaining, insourcing, informing individuals, and new technologies that empower constant connectivity.