Here is a great and insightful quote from over on Musclehead’s blog by Ida Tarbel.
“Ida Minerva Tarbell was an American writer, investigative journalist, biographer and lecturer. She was one of the leading muckrakers of the progressive era of the late 19th and early 20th centuries and pioneered investigative journalism.”
Ida Tarbell says:

“We now face the danger, which in the past has been the most destructive to the humans: Success, plenty, comfort and ever-increasing leisure. No dynamic people has ever survived these dangers.”
― John Steinbeck