The American economy grew at inprecedented rates after WW2, and still grew relatively well after that period. We all know the dismal times the US economy experienced and its recovery, so I ask you this:
What would it take for the US economy to grow at an average of 6% (minimum) from the post-war period to modern day, and how large would the US economy be? Bear in mind that 6% is the minimum. If you find a way to make it higher, then feel free to do so.