It is important for us to understand in the present times that Franklin Roosevelt did not solve the causes of the First Great Depression.
The First Great Depression was precipitated on the heels of the 1929 stock market crash, which itself was brought about by loaning vast, ever greater sums into circulation for market speculation, and then, under the multiplication of debt in proportion to real value which this inflation engendered, one day determining that the speculators had exceeded the bounds of credit-worthiness.
The whole of the problems to which Roosevelt never even replied therefore (because he had no solution), are soluble: ostensible market values were artificially bloated by inflation, which itself was sustained only by multiplying artificial debt. Because the continual escalation of purported value was only sustained by continuous availability of short term credit, *the market could only fail when the Federal Reserve withdrew the availability of further credit*.
The facts of the matter then are that the private banks which comprise the so called Federal Reserve caused the First Great Depression; and that because the privatized currency can only multiply debt in proportion to a circulation, termination is inevitable under an eventual terminal sum of debt, whether the private banks prematurely determine they have destroyed credit-worthiness or not.
Roosevelt did not solve the underlying problems. He simply resurrected the failed system by restoring credit (overriding inherent destruction of credit-worthiness by the system) and by initiating programs which were sustained by introduction of circulation. He left the form of the privatized circulation intact; and therefore, he so much as initiated the second lifespan of the same system, to be concluded yet again when, to maintain a circulation, we have re-borrowed so much interest that the sum of debt once again exceeds us.