Should Alan Greenspan be held accountable......?

for all the economic messes he allowed to happen under his watch,like the Internet bubble,the subsequent accounting -corporate scandals, also the housing bubble he helped create as well. What a way to go Mr. Greenspan,our economy has been on a roller coaster for the last 10 years because he consciously didn't do his job as being the governor of the economy. Isn't that 1 of the responsibilities as being Fed Chairperson,to help stabilize the economy?