Because Two are Better

“Two are better than one, because they have a good reward for their labor.”

For if they fall, one will lift up his companion. 
“Though one may be overpowered by another, two can withstand him.” 

“And a threefold cord is not quickly broken.” [Ecclesiastes 4:9-10,12]
“Where there is no counsel, the people fall; but in the multitude of counselors there is safety.”
[Proverbs 11:14]
Because two are better!