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When it comes to charitable giving should we be ruled by our hearts or our minds? Is it better, for example, to give $100 to buy mosquito nets for dozens of families or should that money go towards training a single guide dog for a blind person? Is there even a right answer? Manuela Saragosa explores the problem with effective altruism.

Contributors: Rev Giles Fraser, priest-in-charge at St Mary, Newington, south London
Peter Singer, Professor of Bioethics at the Center for Human Values, Princeton
Michael Faye, GiveDirectly

(Picture: Charity savings jar. Credit: Getty Images)