How has warren buffett accumulated his wealth?

Warren buffet started investing in the stock market with $105,000 in investor capital in the mid 1950's . Buffet's wealth snowballed because of the incredible compound interest rate he was able to generate. Early it was almost 30% per year and over the long term it works out to around 22% per year.

eg

$100,000 invested at 22% will turn into over $284 million dollars after 40 years.