According to research, social isolation can lead to a plethora of mental health issues and can also lead to premature death. Researchers are learning that even casual interactions with total strangers can have a profound impact on our mental health. Surprisingly, interaction with total strangers also tend to bring enhanced happiness and well-being. In fact, people often share very intimate topics with strangers because the risk is so low. So, the next time you run into a total stranger you might just want to say, "hello, how is your day going?" You might just change the direction of their life.