African Americans.
Many former slaves.
Answer:
Pros
He brought a new cultural idea to his people, friends, followers to his new country.
Cons
He would've lost their original heritage in that movement going forward.
Explanation:
the abolitionists were against slavery and so they disliked the fugitive slave law because it made them return runaway slaves to their owners.
The main world leaders at the time were
Hitler - Germany
Franklin D. Roosevelt - USA
Mussolini - italy
Churchill - Britain
stalin- russia