Across the world, almost half as many people are creating ventures with a primarily social or environmental purpose as those with a solely commercial aim, according to the Global Entrepreneurship Monitor. The movement is driven mainly by younger entrepreneurs and its growth has taken place against a backdrop of corporate scandals in mainstream businesses ... that have brought capitalism's values into question. "Social entrepreneurship has gone mainstream and global," argues Peter Drobac, a doctor who created healthcare ventures in Rwanda. Dr Drobac ... was inspired to get into the field 20 years ago when HIV infection was running unchecked. "Younger generations in my experience are much more deeply connected to the world and to societal challenges. They want careers that allow them to create positive change," he says. Other factors, Dr Drobac adds, include the changing nature of work, "which means that the prospect of spending one's entire career in the same company is becoming vanishingly small". At the same time, technology is creating opportunities for disruptive innovation in sectors such as education and healthcare. While research suggests the majority of social entrepreneurs worldwide are young, the movement has been inspired by figures such as Muhammad Yunus. The septuagenarian Bangladeshi founder of Grameen Bank won the Nobel Peace Prize in 2006 for pioneering microcredit - loans for entrepreneurs too poor to get traditional bank loans, many of them women.