The Worl Is Flat: A Brief History of the Twenty-First Century is an international bestseller book by Thomas L. Friedman, analyzing the progress of globalization with an emphasis on the early 21st century. The title is a metaphor for viewing the world as flat or level in terms of commerce and competition, as in a level playing field —or one where all competitors have an equal opportunity. As the first edition cover indicates, the title also alludes to the historic shifts in perception once people realised the world was not flat, but round and how a similar shift in perception —albeit figurative— is required if countries, companies and individuals want to remain competitive in a global market where historical, regional and geographical divisions are becoming increasingly irrelevant.