in 1820 a series of measures were put in place to improve the conditions of slaves

in the United States, especially in the southern states where slavery was widespread. These measures were intended to address the harsh treatment, abuse, and exploitation of slaves, and to ensure their wellbeing and safety. Some of the measures included:

1. Slave codes: Each state had its own set of laws that governed the treatment and behavior of slaves. These laws were designed to protect the interests of slaveowners and regulate the behavior of slaves. For example, in some states, it was illegal to teach a slave to read or write, or to gather in groups without the presence of a white person.

2. Abolitionism: By the 1820s, there was growing opposition to slavery in the United States. Abolitionist groups and individuals advocated for the immediate emancipation of slaves, arguing that slavery violated the principles of freedom and equality upon which the country was founded.

3. Underground Railroad: Runaway slaves who escaped to the northern states or Canada faced great peril and hardship. To aid them, a network of abolitionists, known as the Underground Railroad, helped guide slaves to safety. The Underground Railroad was a secret organization that provided safe passage, shelter, and food to runaway slaves.

4. Education and religious instruction: Many slaveowners supported education and religious instruction for their slaves, believing that it would make them more obedient and productive. As a result, some slaves were taught to read and write, or received religious instruction from white missionaries.

5. Slave patrols: In order to maintain control over slaves, some states established slave patrols, which were groups of white men who would patrol the streets at night to prevent slaves from wandering outside their masters' homes.

Overall, these measures reflected a growing recognition of the injustices of slavery and a desire to improve the lives of slaves. However, they fell far short of the full emancipation and equal rights that many abolitionists sought.