In London, a walking tour titled 'A Journey Through London's Revolutionary History' celebrates Karl Marx (May 5, 1818 - March 14, 1883), a pivotal figure in political economy. Marx, a German philosopher and revolutionary socialist, developed historical materialism and analyzed class struggle under capitalism. His works, including 'The Communist Manifesto' (1848) and 'Das Kapital' (1867-1894), critique capitalism, predicting its collapse due to inherent contradictions. The tour aims to explore both Marx's personal history and his enduring ideas, which have inspired revolutions and social movements worldwide. In the Philippines, the misinterpretation of Marx's theories has led to 'red-tagging,' a practice criticized by Supreme Associate Justice Marvic Leonen, who emphasizes the importance of protecting ideological beliefs and free speech. Leonen's opinions highlight the historical consequences of suppressing ideologies and advocate for a more tolerant approach to differing beliefs.