The socially responsible investing segment of money management has been around since the 1970s, but its growth has exploded over the last decade and by some estimates now covers more than $6 trillion in invested assets. The strategy also has become much broader in scope and ambition. In the 1980s, most socially responsible mutual funds simply avoided stocks of so-called vice industries — gambling, alcohol, cigarettes and weapons. All other stocks were fair game. Now many of the funds say they specifically seek out companies that treat all of their constituents well: not just shareholders, but employees, suppliers, customers and local communities. The funds also want to see strong pro-environment corporate policies that focus on resource sustainability.