Is it possible to each empathy to a society or culture that already lacks it?

For instance, I often think about turmoil around the world. The lack of value for human life. The hatred and fear of people who are different than you. 
I think about teaching my son empathy all the time. But I often wonder if it's too late to teach empathy to others who have none. I know these things take generations to change. 
If you think it's possible, tell me why. 
If not, tell me why. 

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