Why did Britain decide to abolish slavery in the 19th century and why did they push other nations such as Portugal to abolish it as well? Were their actions based on moral grounds or simply driven by economic reasons?

by tdzida26
BuenaventuraBaez

These answers may be useful:

by /u/girlscout-cookies in Why was Britain so heavily abolitionist in the 19th century?

by /u/agentdcf and /u/sowser in Was Britain's abolition of the slave trade a selfless act of virtue or were there any ulterior motives behind the decision?