Ignatius Donnelly wrote the book of Atlantis in the year 1882 which depicted the story relating to the Atlantis and its people.
Plato was the character in the book who told the story of Atlantis in the ancient times of 360 BC where the People of Atlantis were half as human and half as a god.
Ignatius Donnelly explained the submerged continent, Atlantis, in accordance with Plato. According to Plato, the continent was situated near Gibraltar, which was a strait dividing the Mediterranean Sea from the Atlantic Ocean. This book doesn't support the study of the tectonic plates and the oceanography in today's scenario.
Therefore, the role of Ignatius Donnelly was as a writer of the book of Atlantis.
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