Analyze this timeline illustrating one period of the modern era: 1791
1804
1807
1829
1865
1791: William Wilberforce
introduces the first bill
in British Parliament
to abolish slavery
1804: The Haitian Revolution
ends with the total abolition
of slavery in Haiti.
1807. The Slave Trade Act
outlaws the slave trade
throughout the British Empire.
1829: Mexico outlaws slavery after
winning independence from Spain.
1865: The United States abolishes
slavery following the American Civil War
Which theme does the timeline most reflect?

The transformation of social structure occur in this timeline.

The theme which the timeline most reflect is the transformation of social structure because of the this timeline, slavery in the social structure is eliminated that change the whole social structure and is responsible for the social change in the society. Slavery was present at the bottom of the social structure at that time so it is concluded that the transformation of social structure occurs due to removal of slavery.

after the senate and the house passed different bills and deadlock threatened, a compromise bill was worked out with the following provisions: (1) missouri was admitted as a slave state and maine (formerly part of massachusetts).