Elizabeth Dunn’s TED talk “Helping others makes us happier — but it matters how we do it” is included because it distils experimental evidence that not just giving, but the way we give, shapes individual wellbeing and social outcomes; this directly supports the chapter “Your Worth And Power of the Collective” by showing how individual choices about generosity scale into collective benefit and inform practical approaches to corporate philanthropy, employee engagement, and impact-investing (cited on page 17).