Which leader best understood the threat of adolf hitler to europe and the world in the 1930s? neville chamberlain franklin delano roosevelt winston churchill joseph stalin

 leader best understood the threat of Adolf Hitler to Europe and the world in the 1930s is Sir Winston Churchill 
He was a British author, leader and political leader. double named prime minister of the UK, he solid alliances with us and Union of Soviet Socialist Republics to defeat Nazi Germany in warfare II. British national leader, orator, and author UN agency as prime minister (1940–45, 1951–55) rallied folks|the British|Brits|nation|land|country|a people} people throughout warfare II.