In 1720, the South Sea Company, created to trade in cotton, agricultural goods and slaves, collapsed, causing the financial ruin of thousands of investors and heavy losses for many others, including members of the royal family. King George I called on Robert Walpole, well known for his political and financial acumen, to handle the emergency. With considerable skill and some luck, Walpole acted quickly to restore public credit and confidence, and led the country out of the crisis. A year later, the king appointed him First Lord of the Treasury, Chancellor of the Exchequer, and Leader of the House of Commons – making him the most powerful minister in the government. Ruthless, crude, and hard-working, he had a "sagacious business sense" and was a superb manager of men. At the head of affairs for the next two decades, Walpole stabilised the nation's finances, kept it at peace, made it prosperous, and secured the Hanoverian succession.