The year 1848 saw the year 20 saw a number of important historical events, some of which include:
1.Publication of the Communist Manifesto: On February 21, 1848, Karl Marx and Friedrich Engels published the Communist Manifesto, a programmatic document of Marxism that marked the birth of Marxism.
2.European Revolutions: In 1848, a series of revolutions broke out in Europe, including the February Revolution in France, the March Revolution in Germany, the March Revolution in Austria, the Italian War of Independence, and more, which marked changes in the political and social systems of Europe.
3.Discovery in California, USA**: In 1848, the discovery in California, USA**, sparked the westward expansion of the United States and the gold rush, which had a profound impact on the economy and society of the United States.
4.The United Kingdom enacted the Public Health Act 1848: In 1848, the United Kingdom enacted the Public Health Act 1848, which set out the standards and requirements for urban health and public health, which was the first public health act in the world.
These events had a profound impact on the world at that time, and also had an important impact on the subsequent development of history.