I believe that the human being is always in constant evolution and as time passes as a group or society we can feel the impact that this brings on us.
my professor of psychology said; "the mind of man will always be in contact with what he hears and looks at, everything around us is a detanator, which will give us positive and negative reloads", that is: what comes out of our vocals has a lot of power, when it reaches the other people.. @chbartist