1. Rejection of(or week commitment to) democratic rules of the game.
2. Denial of legitimacy of political opponents.
3. Toleration or encouragement of violence.
4. Readiness to curtail civil liberties of opponents including media.
"Politicians who meet even one of these criteria is cause for concern. What kind of candidates tend to test positive on the litmus test for authoritarianism? Very often, populist outsiders do."
Source: How Democracies Die by Levitsky and Ziblatt
2. Denial of legitimacy of political opponents.
3. Toleration or encouragement of violence.
4. Readiness to curtail civil liberties of opponents including media.
"Politicians who meet even one of these criteria is cause for concern. What kind of candidates tend to test positive on the litmus test for authoritarianism? Very often, populist outsiders do."
Source: How Democracies Die by Levitsky and Ziblatt