What a retard <| sep |> I have a very particular skill set . <| sep |> The effect of Keynesian economics on the recovery is debatable . The most extreme policies were deemed unconstitutional and voided , but probably could have been the most effective . Realistically , the war effort and reliance on the US in the aftermath was what fueled the recovery . We were able to give people jobs through the war effort , instead of creating artificial projects to keep people busy . The biggest changes to prevent another crash were actually already in place , but responded poorly during a crisis . The expansion and reforms of The Federal Reserve is probably the biggest safety net in case of another crash , but again , it was technically around , but it failed to perform its duties that time around . Its facets were bad then , just as they are now .