While Britain’s overseas aid has dwindled in recent years, unwinding the web of tax havens instead would help many governments fulfill the rights of their citizens. If we were to reverse the tax revenue losses caused by the UK spider’s web, there would be 36 million more people with access to basic sanitation, 18 million more people with access to basic drinking water, and almost seven million children could attend school for an extra year, according to the Universities of St. Andrews and Leicester modeling tool GRADE.