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The inventor of stocks could be traced back to the 17th century in England, when people began to use bonds to represent part of the ownership. In the 19th century, the stock market began to develop. By buying stocks, investors could share in the success and profits of the company. With the development of the modern financial market, stocks had become one of the most important investment tools in the world.

AD was a calendar created by the Italian doctor and philosopher Aloysius Lilius to reform the Julian calendar. It was approved and promulgated by Pope Gregory III in 1582. The year of the Christian era began with the birth of Jesus.

The novel emerged in the 18th century. But its roots can be traced back to earlier forms of storytelling.

Fanfiction can't be traced back to one specific inventor. It developed gradually as fans began sharing their own takes on beloved works. Different communities and individuals contributed to its growth over time.

The origin of fiction is not something that can be precisely dated. It developed throughout history as people's creativity and desire to tell made-up tales grew. Different cultures likely had early forms of fiction at various points.

The development of novels can't be credited to one individual. It was a gradual process influenced by various literary traditions and cultural factors. Different cultures and periods had their own forms of storytelling that eventually led to the modern concept of a novel.

Manga was invented in Japan.

Manga was invented around the 1860s. It emerged as a unique form of visual storytelling in Japan and has since evolved and diversified.

Manga has evolved over many years with influences from various artists and cultures. So, pinpointing one inventor is quite challenging. Different styles and techniques emerged gradually, shaping what we know as manga today.

The invention of comics is a bit hard to attribute to a single person. It evolved over time with contributions from many.