The influence on Plato refers to the various philosophical ideas and thinkers that shaped his thoughts and theories, particularly during the formative years of his intellectual development. This influence primarily stemmed from Pre-Socratic philosophers, who sought to explain the nature of reality, existence, and the cosmos through reason and observation rather than mythology or religious dogma. Plato's engagement with these ideas helped him formulate his own theories, such as the Theory of Forms, which posits that non-material abstract forms represent the most accurate reality.