Why did some new European govern-
ments survive and others fail during
the 1920s?

Economic depression make many democracies became weak and they became threatened for the communism and dictators.

The 1929 Crisis was a consequence of the great expansion of credit through money supply (issuance of money and bonds) carried out by the Federal Reserve System (a type of US Central Bank) since the early years of the 1920s. from 1929, this expansion had to be stopped by the Government, since the adjustment of accounts needed to be done. The Government then stopped expanding the money supply and began to operate a loan restriction policy. Fearing the currency's devaluation, many people and companies withdrew their reserves from banks, initiating a recessionary process.

the catholic church withhold people's access to the bible during the middle ages.

people could go to church and listen to the teachings, but it was absolutely forbidden to own and/or read the books of both the old and new testaments. it was also prohibited to translate the books (which where originally in biblical hebrew) to any other language.

this was done so the church could remain in control of what their teachings were and to enhance their importance and power, while also being able to judge people's actions through information that was unavailable for the general public.