1

1 (also called unit, unity, and unicycle) is the loneliest number that you'll ever do. It can be used for counting.

History
The history of one started with the start of the universe and me. Yes, I am The One. For a long time, there was only one universe. Unfortunately, sometime around 4000 BC, the number two was invented and the universe started duplicating itself. However, one is still very important today, being the most likely first digit of a number. One is also used for counting.

How to count in ones
To write a number using only ones, write out as many ones as the number is worth. For example 1,440 equals 11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111

 *inhale* 

11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111

 *inhale* 

11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111

 *inhale* 

11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111

 *inhale* 

11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111

 *inhale* 

11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111

 *inhale* 

11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111

 *inhale* 

11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111

 *inhale* 

11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111

 *inhale* 

11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111

 *inhale* 

11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111

 *inhale* 

11111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111

 *inhale* 

111111111111111111111111111111111111111111111111 in ones.

Shit, I probably should've picked a smaller number. How about 5? It's 11111.

Why should I care about one?
Because 1 is the ultimate number. It is the namesake of "the one".