Lucretius was a Roman poet and philosopher who lived in the 1st century BCE. He is best known for his epic poem, De Rerum Natura (On the Nature of Things), which explores the philosophy of Epicureanism. In this work, he explains the nature of the universe, the importance of seeking pleasure, and the idea that fear of the gods and death should not dominate human life. His writing combines scientific ideas with poetic expression, making complex concepts more accessible. Lucretius aimed to free people from superstition and promote a rational understanding of the world. His influence can be seen in later thinkers, including Renaissance philosophers and scientists.