How do you think the world would be different if there was only one language?

I think the world would be totally different if the world uses only one language because I believe the language has great effects on the way people think and live. But, it\'s difficult to imagine how the world would be different. Maybe there would be less dispute or conflict because there would be more possibilities to understand each other by using only one language. Also, technologies and knowledge would be more improving because it\'s more easier to share each other\'s result of research and study. But considering the conflict between North Korea and South Korea even we use same language, there wouldn\'t be big difference from now.