Why did the Americans win the War of Independence?

Why did the Americans win the War of Independence?
Before the first shots were fired in the American War of Independence, very few people gave the Americans (also known as the 'colonists' or 'patriots') a chance. Britain had a population of 11 million compared to the patriots 2.5 million of whom 20% were slaves. Furthermore Britain had the most powerful navy in the world, an experienced and well-armed standing army of 48,000 men and the support of tens of thousands of loyalists and Indian tribes. Britain also held the economic advantage as they could rely on the profits from the South Atl…