Scenario: Collapse of human civilization

Here are some dates that may lead to the end of human civilization.
== Causes ==
The Mayans believed that the world would end on December 21, 2012. It is likely for various reasons, majorly because of the numbers 1 and 2 in the date. However, not much of the population believed the Mayans. The date marked the conclusion of the 13th b'ak'tun of the Mesoamerican Long Count Calendar. With that happening, it would cause thousands of disasters ranging from earthquakes to black holes. B'ak'tuns mean a k'atun, a tun, a uinal and days. The Mayan tzolk'in is the current Mayan calendar that lasted for 260 days. However, it is not compared to a b'ak'tun. B'ak'tuns last for 394 years (144,000 days). December 21, 2012 represents 8.3.2.10.15 in the Mayan date. 8.3.2.10.14 is December 20, about a day before the real apocalypse occurs.
Another one of these apocalypses is from the Talmud, a 2,000-year-old biblical manuscript. The Talmud is known for the period of desolation because it says about 6 millennia after the creation of Earth, the period of desolation will happen, leading to the end of the world. The Hebrew calendar says that 2239 is the correct year of the 6000th year and the 7000th year is 3239, leading to the end of the millennium-long period of desolation. The Talmud also describes that the Messiah would come ahead of the 6000th year. Apocalyptic events are not such type of a biblical order, but it is a fact. 3761 BCE is known to be the creation. 
The Nibiru cataclysm also follows the script of apocalyptic events. There were many such dates on whether it were to happen, like 639, 843, 1222, 1385, 1414, 1666, 1787, 1790, 1820, 1824, 1856, 1860, 1880, 1940, 1970, 1987, 2010, 2011, 2019, and 2021. There was no such fact because the Nibiru cataclysm was going to begin on the dates since it was prophesized for a long time. The Nibiru cataclysm is an event where asteroids hit the earth. The earliest known fact of the Nibiru cataclysm was found about 700 years before the creation of the Persian Empire. 
People also reveal Noah's Flood as a eager fact. In the Talmud script it would read out as 3261 BCE since Noah was about 500 years old at that time. 
From 1994, 1995, and 2011, Family Radio president Harold Camping made a series of predictions about the end of the world. He said that the world will mess up and be destroyed by types of disasters. His own theories were followed by eBible Fellowship. 
== Country Collapses - Hypothesis ==
=== United States ===