Doing good is good for you: Ethics and the Human Sciences, TOK and CAS

Is there really anything newsworthy about the value of doing good to others?  So much has been said over so many centuries that surely current psychological research cannot add tremendously to our understanding!  And surely doing good falls within the scope of ethics -- and not within the scope of the human sciences! Yet, quite the contrary: recent studies in the human sciences do contribute knowledge, and delightful knowledge at that! Personally, I find the results of these studies give my heart ...