The principality of Liechtenstein kicked off a campaign on Monday to enlist the global financial sector to fight modern slavery, flexing its role as a center of world wealth management to tap the clout of banks, hedge funds and investors. The financially focused effort aims to fight money laundering by traffickers, promote ethical investment and offer opportunities to people vulnerable to slavery, organizers said at the annual meeting of world leaders at the United Nations. Globally, modern slavery is believed to generate illicit profits of $150 billion a year, according to the International Labor Organization, which estimates more than 40 million people are enslaved around the world.