UFOs exist, aliens exist among us, the earth is flat, the man never reached the Moon, Adolf Hitler survived and went into exile in Latin America, global warming does not exist and the pandemic was invented by the Chinese to dominate the world are some of the conspiracy theories that continue to exist in the 21st century and that cast doubt on their veracity or that cause fear if they are true.

And it is that conspiracy theories date back to ancient times such as in the era of the Roman Empire or Alexander the Great and have extended to different regions and cultures throughout the world.

Conspiracy theories are assumptions about the existence of a group of actors gathered in a secret agreement to pursue objectives that are considered to be evil. In this book, we collect the most alarming and that is still valid.