"There is no more sure tie between friends than when they are united in their objects and wishes."
"When spider webs unite, they can tie up a lion."
~ Ethiopian proverb
Each of us is an individual note in the music of humanity. When each note is played simply for its own personal reason, the overall sound is one of discord. When we espouse a cooperative attitude, we naturally gravitate to thinking in terms of "us" verses "me". Cooperation is the act of working together in harmony. Think of the music we could create if mankind sang together in brotherhood.