Solid_Choke:
is it possible to have a slow and controlled increase in the money supply over time without having major depressions?
A growing economy - more people, more activity - requires a growing money supply, just as a growing population requires a growing food supply. If it always grew at the exact amount required, monetary-caused booms and busts wouldn't happen, and there would be no price inflation nor deflation. But that's impossible. Even on a gold (or any other commodity) standard, the changes in supply do not completely follow instantaniously the increases or decreases in demand. Gold can be effectively withdrawn from the system - temporarily at least - by people holding on to it, and new discoveries in places where extraction costs are below the going rate can happen any time.
Secondly, fractional reserve banking can be done even in a currency backed by gold (sometimes called "fractional receipt banking" to distingusih it from FRB where the reserves are themselves fiat or credit-backed currency). This is legitimate, beneficial, and would likely be demanded by the market so long as the currency is not coercively monopolized, the reserve level is openly made known to depositors, and convertibility is maintained. But this can lead to expansions or contractions of the supply unrelated to the expansion and contraction of the underlying gold supply.
And lastly, booms and busts can be and are caused by normal business activity. Just as the supply of money has to match the demand, so does the supply of everything else. Oversupply causes manufacturing to slow, causing workers to be laid off, and this circles back and further reduces demand for goods. The opposite can happen if inventories get too low, if new technologies are invented for which there is a sudden new demand, etc. The market can adjust to these fairly well, makes it unlikely to happen across all industries sumultaneously, and has even innovated practices that, while not necessarily the intent, tend to mitigate the ability of such cycles to build on themselves, such as "just in time manufacturing".
The Federal Reserve was established to do two primary and related things. First, it was to be the "lender of last resort", effectively a backstop against runs caused by banks too aggressively lowering their reserve fraction. Second, it was to try to anticipate market demand for money and proactively increase or decrease the supply.
Predictably, in a coercively monopolized fiat currency and with a bank that is both isolated from market forces and designed to "protect" regular banks from market forces, it has caused more damage than it has prevented. It has repeatedly exacerbated organic booms and busts by mis-timing its expansions and contractions. This is completely forseeable in that the Fed has less information than the markets in aggregate have - and it acts explicitly to distort the price information that is available. In addition, it quickly became politicized to the point where, rather than simply trying smooth out business cycles, it has been used to try to create booms and eliminate busts. Instead of contracting and expanding the money supply, it has operated in two modes: expand the money supply slowly or expand it quickly. The problem is that this creates booms all out of proportion to any normal business cycle, such as the massive housing price inflation of this decade, and so the busts are proportionally more dramatic. And this happens against a background of continual inflation in both the money supply and prices - as we've seen with things like oil and commodities continuing to climb even though we are currently in a bust cycle.
So your answer is that we cannot avoid a boom and bust cycle entirely, but only corecive intervention and market distortion is likely to cause anything on the scale of the Great Depression - or even the recent housing and credit bubble/bust.
The state won't go away once enough people want the state to go away,
the state will effectively disappear once enough people no longer care
that much whether it stays or goes. We don't need a revolution, we need
millions of them.