What led to the passage of the 15th amendment was the rising discrimination between different racial, sex, and social groups within the united states. It was ratified during the first or second reconstruction after the civil war, it granted blacks to vote along with women and foreign immigrants. another reason was due to the KKK, the Black codes, the Jim Crow laws, along with the rising "red scare" or the threat of communism in america at the time.
The advantages was to make these individuals feel safer and more free when exercise their basic human rights, but it also meant more votes in elections. Another advantage was to help stop discrimination.
15th Amendment: "The right of citizens of the United States to vote shall not be denied or abridged by the United States or by any State on account of race, color, or previous condition of servitude."
This should give you the idea I hope this helps :)
In order to provide help with personal issues such as the ones related with soul care, as well as, psychological help or religious counseling, care providers should do some self exploration. It is important to know ourselves to be able to understand another human being.