In the 1950s, the average age of a company on the S&P 500 index was 60. Today, that number is 20. This means that the most successful corporations are growing three times faster than they have in the past. To succeed at this rate of rapid change, employees and business leaders have had to adapt by adopting growth mindsets, learning new skills, and embracing flexibility. Where stability and long-term planning were once the mark of a sound strategy, adaptability is the new competitive advantage.