Our world is increasingly interdependent, but I wonder if we truly understand that our interdependent human community has to be compassionate; compassionate in our choice of goals, compassionate in our means of cooperation and our pursuit of these goals.
One of the expressions of Western over-reliance on technology can be seen in the lack of patience in industrial society. When you deal with technology, everything happens at the touch of a button. This conditions you to become so impatient that when you have an emotional or personal crisis, you don't allow time for the solution to take effect. This leads to all sorts of rash responses, like quarrels, fights and so on.
Every man has the basis of good. Not only human beings, you can find it among animals and insects, for instance, when we treat a dog or horse lovingly.
Ultimately, the reason why love and compassion bring the greatest happiness is simply that our nature cherishes them above all else. The need for love lies at the very foundation of human existence.