The Neapolitan practice of caffè sospeso or ‘suspended coffee’ enjoys a knockon effect throughout Italy and beyond. Patrons buy two or more cups of coffee, consume only one and leave the remaining for those who cannot afford to pay for the drink. Why would some people do this and make a sacrifice for others whom one does not know and without expecting any rewards? Why forgo personal gains so that others can benefit, even when these others do not yet exist and may belong to generations st...