In "How Democracies Die," Steven Levitsky discusses the convention system as a crucial mechanism for political parties. This system serves as a gatekeeper, effectively sifting through candidates to exclude those who pose a risk to democratic norms. By filtering out dangerous individuals, the convention process helps maintain the integrity of the party and the broader political system.

Levitsky highlights the role of party insiders in this process, likening it to a peer review system. These insiders evaluate and endorse candidates, ensuring that only those who adhere to accepted standards and values rise to prominence. This collaborative approach among party members reinforces the democratic foundation and guards against the emergence of radical elements within the political sphere.