Bill Gates, Microsoft chairman.  Photograph: Reuters Ethan Miller

Investors need to become more discriminating when investing in technology start-ups, following recent “over-enthusiasm” in Silicon Valley, according t(...)

The cofounder of Microsoft, Bill Gates,  and his wife Melinda established the Bill & Melinda Gates Foundation in 2000, turning it into the wealthiest charitable foundation in history. Photograph: Steve Sands/FilmMagic

Mark Zuckerberg is the latest in a long line of business executives who have decided to give away much of their fortune. At just 31, however, he is a(...)

Saudi Arabian Prince Al-Waleed bin Talal said the pledge was a “commitment without boundaries. A commitment to all humankind.”. Photograph: Fayez Nureldine/AFP/Getty Images

Saudi Arabia’s Prince Al-Waleed bin Talal al-Saud has pledged to donate his entire $32 billion fortune to charity in the coming years – one of the big(...)

Melinda Gates gives a speech  as part of the two-day European Development Days  event in Brussels. Photograph: John Thys/AFP/Getty Images

The European Union says it is committed to reducing the number of children who are chronically undernourished by at least seven million by 2025. Spea(...)

Liberian Red Cross burial team retrieves the body of a suspected victim of Ebola  on the outskirts of Monrovia, Liberia. Liberia was  declared free from Ebola on 9th April 2015. Photograph: Ahmad Jallanzo/EPA

Public health experts involved in the response to the Ebola crisis have condemned what they described as a ludicrous, insulting and opportunistic atte(...)

Microsoft founder and philanthropist Bill Gates cheered us up by drinking water that moments before had been a pile of faeces. Watching Mr Gates drin(...)

In his book, “Capital in the Twenty-First Century” Thomas Piketty examined centuries of data on countries including the US, Sweden, France and the UK to show that returns on capital in excess of economic growth lead to widening disparities in wealth. (Photograph: Bart Matt/EPA)

Thomas Piketty, the French economist whose best-selling book has added tinder to the debate on income inequality, counts the world’s richest person am(...)

Bill Gates, the world’s wealthiest man and an advocate of philanthropic giving, has turned to his 16.2 million Twitter followers to solicit ideas for (...)

German’s Angela Merkel claims accolade for fourth year in a row: Photograph: Christoph Schmidt/EPA

Forbes magazine has ranked Germany’s Angela Merkel the most powerful woman in the world for the fourth year in a row in the annual list dominated by p(...)

Outgoing US health and human services secretary Kathleen Sebelius speaks after President Barack Obama (left) announced his nomination of Sylvia Mathews Burwell to replace her, in the Rose Garden of the White House in Washington yesterday. Photograph: EPA/Jim Lo Scalzo

US health and human services secretary Kathleen Sebelius departed yesterday as the White House seeks to limit(...)