He argues that social liberalism has systematically undermined Christianity. It has been argued that population aging has undermined economic development. Although restored to power, Gorbachev's authority had been irreparably undermined. Historical research has largely undermined the myth. Corrupt officials may have undermined the government's enforcement efforts. Alite's testimony was largely undermined during cross examination. These efforts have undermined public confidence in climate science, and impacted climate change lobbying. The leadership has been consistently undermined by targeted assassinations. This severely undermined Perot's campaign in the 1996 election. The Viking raids further undermined centralized government. Hitler's diplomatic triumph undermined and demoralised the conspirators. His leadership was also undermined by sex scandals. Revisionist history has undermined earlier narratives. He fears his own position will be undermined. The blockade seriously undermined the Russian export economy and helped shorten the war.