Pedro protected them – to public outrage. Pedro aimed to abolish slavery slowly to avoid revolts and an agricultural crash. In 1885, the Sexagenarian Law freed slaves at sixty. Finally, on 13 May 1888, Isabel abolished slavery and freed 700,000 slaves, generating a surge of popularity as Redeemer of the Blacks. While black people supported the monarchy, forming a Black Guard to defend it, many planters became republican.