Um, food. Lol ^_^
That is easy " LOVE ".
Thats Easy______ MY Best-est Shouter Friend Ever
All of those are such good answers. Certainly we could not live at all without food. Family and love are 2 of the most important things one can have in their lives. So I agree 100% with those answers. But, since they have been taken, I will go with electricity. I am so glad I was not born into a time frame when there was no electricity. Think of all the things we would not have!