If someone is fallible, this means that the person is likely to make errors or fail. All humans are capable of making mistakes, therefore, all people are fallible. However, the word can be applied to other topics as well. If a scientific theory is fallible, it means that it is possible to prove it wrong. Fallible refers to anything that can potentially fail.
The reliance on foreign loans following the Dawes Plan led to a severe economic depression following the Wall Street Crash. This ultimately led to further political instability, and eventually, contributed to the end of democratic government.
Before the agricultural revolution much of England's farmland was "common" land, since there was far less competition in terms of the land being used for crop cultivation.