Some big corporations have grown a conscience. At least, that’s the message from the Business Roundtable, which a few months ago announced that from now on, its members will focus not solely on lining their shareholders’ pockets. They have also said that they will work on investing in employees, dealing fairly with suppliers, and working to protect the environment. Entrepreneurs are bringing in purpose-driven leadership. Those are laudable goals — but the goals are also the ones many smaller companies and startups are already striving toward with remarkable success.