I recently came across a fascinating article called “The Top 10 Inventions That Changed The World.” Whenever I come across lists like these it is always fun to see how many of these I can guess. I am going to put 10 blanks up on the screen, beginning with number 10.

Here are the top inventions in order from 10-to-1:

10. The Plow
9. The Wheel
8. The Printing Press
7. The Refrigerator
6. Communications (Telephone, TV, etc)
5. The Steam Engine
4. The Automobile
3. The Light Bulb
2. The Computer
1. The Internet

When I first read this, I thought of one they missed. There is one invention that has had more of an influence on the world than any other product ever created. The only difference is it is not a product, but a relationship. To me the greatest invention in the world that by the way w…