This document discusses Brazil's use of collective habeas corpus petitions to challenge systemic rights violations against vulnerable groups in detention. It notes that the Brazilian Supreme Court granted the first collective habeas corpus petition in 2018 to protect the rights of pregnant women, mothers, and young children in provisional detention. Since then, additional collective habeas corpus petitions have been granted to address issues like juvenile justice, minor drug offenses, and prison conditions during the COVID-19 pandemic. The document argues that collective habeas corpus remedies are aligned with collectivizing rights and addressing the systemic nature and causes of illegal acts within prison systems.