Samuel Arnold graduated from North Missouri Normal School and began his career in the internal revenue office in St. Louis. He transitioned to the lumber industry, establishing the Arnold Lumber Company in Kirksville. Arnold's professional expertise spans both the private and public sectors, including nearly a decade in high-finance risk management. He founded the North Missouri Broadcasting Company, operating radio stations in Kirksville and Trenton. Arnold's background reflects a blend of business acumen, entrepreneurial spirit, and media experience.

Samuel Arnold's political philosophy reveals an intriguing blend of traditional Republican fiscal conservatism with an unexpected advocacy for sustainable practices. His support for small businesses and local entrepreneurship underscores a localized approach to economic policy, while his promotion of sustainable forestry practices indicates a surprising alignment with environmental stewardship. Arnold's dual involvement in the lumber industry and broadcasting suggests a unique ability to navigate and influence both economic and media landscapes. His legislative record shows a calculated approach to balancing industrial interests with environmental concerns, hinting at a nuanced, ideologically agile strategy.