The epidemic of the "Black Death", also called the black plague or bubonic plague, throughout Europe and Asia, has become one of the most famous events in history. This plague killed 30-60 percent of the entire population of Europe at that time, which ranged from 75 to 200 million people. Population growth did not continue until a century later, and the global population did not recover until the 17th century. The deep religious, social, and economic turmoil caused by the black plague was inevitable.

Historians argue that all events that took place in the twentieth century led to World War I (1914-1918). This event was caused by the assassination of Archduke Franz Ferdinand II, heir to the throne of Austria, by the Yugoslav nationalist, Gavrilo Princip, in June 1914.

The October Revolution or the Bolshevik Revolution was a socialist Revolution – and at the same time successful, in the world. Starting with the revolutionary movement in the Russian Empire to overthrow the autocracy under the Tsar in February 1917, Vladimir Lenin continued the revolution to overthrow the provisional government in October 1917.

The Renaissance sparked the rebirth of civilization after the Black Plague, ridding ignorance and giving birth to the development of mathematics and astronomy. Books were printed for the first time, giving ordinary people the ability to read at will. Science, art, and literature advanced to new heights. A world map is drawn up and new civilizations are discovered. The idea that the earth is the center of the universe has been debunked.

The printing press is perhaps the most important invention of the last 2,000 years. German inventor Johannes Gutenberg introduced the printing press to Europe, revolutionizing literacy and acting as a catalyst for the spread of knowledge around the world. His invention was one of the main driving forces behind the Renaissance.

The Industrial Revolution is often depicted with large-scale machinery industry, the explosion of new inventions, and the beginning of the modern age. The Industrial Revolution first started in 1760 in Great Britain. The exact cause of the Industrial Revolution is not known. However, this event is generally considered to be the impact of the Renaissance, and spread throughout Europe after the French Revolution. As a result, the last traces of feudalism disappeared and the era of modern capitalism began.

Imagine a world without doctors or modern medicine. Very scary, right? It's hard to believe the fact that centuries ago there were still many beliefs that illness was caused by evil spirits or as divine punishment for sinners.

Many think that the American Civil War had implications only in the United States. In fact, the victory of the Union over the Confederacy was a setback for the pro-slavery group at the time. After the Union victory, the republic of the United States was restored and slavery made illegal – a blow to the global slave trade and absolute monarchy. This event is also the deadliest war the United States has ever experienced.

This incident took place after a 53-day siege by the 21-year-old Sultan Mehmed II of the Ottomans. Constantinople was not just any city; it is the leading city in the world and has been the capital of the Byzantine Empire for sixteen centuries.

Derived from the Latin word meaning "Roman Peace," the Pax Romana was a period of two hundred years of peace within the Roman Empire. Of course this was an extraordinary achievement for a kingdom known for its thirst for war.