David Icke is a British author and public speaker known for his controversial views on politics, society, and conspiracy theories. He gained prominence in the 1990s after claiming that many world leaders are actually shape-shifting reptiles from another dimension. His ideas often challenge mainstream beliefs and have attracted both followers and critics. Icke has written numerous books and delivered lectures worldwide, discussing topics such as globalization, the media, and the nature of reality. His theories often intersect with themes of spirituality and alternative history, making him a polarizing figure in contemporary discourse.