The Evolution of Gratitude ALK3R How did gratitude evolve? Researchers are starting to trace this common human emotion all the way back to primate behavior. View original post 1,736 more wordsShare this:TwitterFacebookGoogleLike this:Like Loading... Related Leave a Reply Cancel reply Enter your comment here... Fill in your details below or click an icon to log in: Email (required) (Address never made public) Name (required) Website You are commenting using your WordPress.com account. ( Log Out / Change ) You are commenting using your Google+ account. ( Log Out / Change ) You are commenting using your Twitter account. ( Log Out / Change ) You are commenting using your Facebook account. ( Log Out / Change ) Cancel Connecting to %s Notify me of new comments via email.