- The obvious advantage is that there would be an easier understanding from one person to the other; meaning that there would not be any form of miscommunication (perhaps preventing conflict).
- Throughout history many people have been discriminated due to their culture (specifically their language) and therefore, if there was a common language, there would be no stereotypes.
- Perhaps there would be less territorial conflict between countries, as if each person shares the same language, perhaps they would also share the same flag, meaning that "countries" would not even be the same word it means today.
- Another advantage would be that the "uniqueness" formed of one's own personality would be lost, because sometimes a language defines the attitude of the person (i.e. British - formal). Therefore, this is grey area, because while it is lost, this would result in less conflict of different personalities.
- Lots of literature would become universal (i.e. People would understand each other's religions more, such as the Quran)
Disadvantages
- With different languages, this renders our world with diversity. Due to this, with one common language, there would be no diversity nor individual pride of one's own nation. This kind of "individualism" that people enjoy having would cease to exist.
- Similar to the previous disadvantage, one common language would be that the world would simply be boring. This "uniformity" of the world would loose our culture.
- Another disadvantage is that everyone's history would be the same (roughly) because with no diversity comes no disputes as there are (practically) no opposing forces contrasting each other, meaning that a countries value that was built on their history would be lost.
- Although this is a small disadvantage, it is worth saying that certain linguist jobs as well as human-translator jobs would be lost.