India, April 2 -- It is election season in 64 countries, such as India, the US, the UK and the European Union. Political advertising is increasing worldwide. Political parties and candidates often use negative campaigns to make themselves appear better and their opponents weaker.

Parties have used negative campaigning since the 1828 US presidential race. Historians say the John Quincy Adams/Andrew Jackson contest was the nastiest. In 1964, Lyndon Johnson discredited his opponent, Barry Goldwater, using radio ads, including the "Daisy ad."

Donald Trump aired an ad depicting his opponent, Hillary Clinton, collapsing in public during the 2016 US Presidential campaign. In the 2020 election, Presidential candidates Trump and Joe Biden engage...