“LABOUR, CAPITAL, and ability are a three-legged stool... They are equal members of the great triple alliance which moves the industrial world,” said famous philanthropist Andrew Carnegie, who was the wealthiest man in the world at the beginning of the 20th century. He established the Carnegie Corporation of New York in 1911 dedicated to the principles of `scientific philanthropy', but now his do-gooding baton has been passed to other billionaire entrepreneurs who might agree with Carnegie's notion that “the man who dies thus rich dies disgraced”. This new generation includes Amazon founder Jeff Bezos, who recently announced he will give away most of his $124bn fortune to help causes including fighting the climate crisis, and Microsoft founder Bill Gates, who established the Bill & Melinda Gates Foundation to tackle inequalities. The notion of philanthropy - a form of altruism that consists of private initiatives, for the public good - can stir up controversy for those who think that it is the role of the state to invest and to provide for its citizens, or for others who believe that individual philanthropists can exert too much power and influence through the causes that they support. Politics aside, it provides much-needed money to fund research, innovation and technology designed to solve Earth's most pressing problems, from pandemics to climate change. "Philanthropy is about taking a long-term systemic and entrepreneurial approach to driving system change. As such it is absolutely potentially a huge driver of innovation,” says Clare Woodcraft, a fellow at the Centre for Strategic Philanthropy at Cambridge Judge Business School. As risk capital, it fills `market gaps' where there are no incentives to operate, such as radical ideas. “Philanthropy can provide patient capital so that social change makers, social entrepreneurs and practitioners interested in addressing the world's entrenched socio-economic challenges differently, have the support, the funding and the time to test new solutions,” she says. There are two main approaches favoured by philanthropists looking for new ways to improve the lives of others: collaboration and competition.