It depends entirely on what country "your country" refers to.
Some possible reasons are:bad weatherdiseasetoo many predatorsinvasive species
Some of the reasons for the decline of Sumer include the reduction of agricultural production. There was a population decline during this time, weakening the power of the Sumerians.
Find out what the reasons were and decided what were not the reasons.
farmers
ala
well, if you mean: "Can a country's standard of living decline?" then in answer to that question i would say yes, a country's standard of living can decline, anything can get worse no matter what it is
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Poachers hunting this endangered species has made the number of their population decline.
true
The answer is that they just pooped
The decline Bad emperors Inflation with economy Mercenarie army Too big
black death (plague) and crusades