How materialism makes us sad

Two quotes of note from the article and its sources:
- A study at Berkeley University, quoted by Music ... "The higher up the social-class ranking people are, the less pro-social, charitable and empathetically they behaved " consistently those who were less rich showed more empathy and more of a wish to help others.", and
- "Those with more materialistic values consistently have worse relationships, with more conflict," Music writes. "This is significant if the perceived shift towards more materialistic values in the west is accurate."