Sinclair Lewis, a prominent American author, explores themes of scientific ethics and societal issues in his works 'Arrowsmith' and 'It Can't Happen Here'. Set in the early 20th century, 'Arrowsmith' follows the journey of a dedicated scientist who grapples with the moral dilemmas of his profession amidst the backdrop of a changing world. Lewis's writing style is characterized by its sharp wit and incisive social commentary, making this novel a timeless classic in the realm of American literature. In 'It Can't Happen Here', Lewis presents a chilling vision of a totalitarian regime taking over America, serving as a cautionary tale about the dangers of political extremism and complacency. Through vivid storytelling and rich character development, Lewis paints a haunting picture of a nation on the brink of collapse. Readers seeking thought-provoking narratives that delve into complex ethical and political issues will find both 'Arrowsmith' and 'It Can't Happen Here' to be engrossing and relevant reads.