Who tried to abolish the slave trade

David Livingstone tried to abolish the slave trade.

David Livingstone was a Scottish physician, Congregationalist, and pioneer Christian missionary with the London Missionary Society, an explorer in Africa, and one of the most famous British heroes of the late 19th-century Victorian era.

Slave trade is defined as the capturing, selling, and buying of slaves. Slavery has existed across the world since ancient times.

freedom of speech is also protected by the 1 amendment.

explanation:

here is pretty much what the 1st amendment says:

congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the government for a redress of grievances.

not sure might be he acquired the entire oregon territory from great britain