The USA is one generous nation. Americans donated a record $471 billion (£327bn) to good causes in 2020, according to the Giving USA Foundation, perhaps unsurprisingly in a year defined by COVID-19 and racial justice efforts. And some of the nation's richest gave away billions, propelling themselves onto the list of the most deep-pocketed Americans in history. Click or scroll through the billionaire Americans who have given away the most money over the years.