Try and think of a Social Invention of your own design. Here is one that I thought of.

Language is the barrier to most problems in the world today. I propose the creation of a common language, such as that of the old northwestern tribes of the United States using a trade language know then as Yakima Jargon. This language system could consist of either spoken word alone, or possibly a combination of words with hand signals.

This language could be known as earthian.

What is Esperanto? Esperanto is a planned (constructed) language intended for use between people who speak different native languages.

http://www.webcom.com/~donh/efaq.html

Haha, that's funny. I thought of Esperanto the minute I saw the post! A pretty failed experiment, eh?