Rebecca J. Scott, 39, associate professor of history at the University of Michigan and a specialist in slave emancipation in the Americas.

One factor is slave emancipation: sharecropping provided the freed slaves of the USA, Brazil and the late Roman Empire with land access.

His work is concerned mainly with labor and race in the American South, although much of his most recent scholarship focuses on the aftermath of slave emancipation.

He was a strong advocate of slave emancipation, and was an honorary member of the Pennsylvania abolitionist society.

He was one of the earliest advocates of slave emancipation, and one of the first members of the committee of 1788 against the slave trade.

Erected in commemoration of the 200th anniversary of slave emancipation, Dr John Sentamu unveiled the new statue in autumn 2007.

Every major movement in Western history has been accompanied by its own collection of protest songs, from slave emancipation to women's suffrage, the labor movement, civil rights, the anti-war movement, the feminist movement, the environmental movement.

During his short tenure on Reunion, one of his main challenges was to smooth the difficulties associated with the slave emancipation pushed forward by the French homeland.

This law was repealed by the 1782 law allowing slave emancipation by will or deed.

Slave relationships in Africa have been transformed through three large scale processes: the Arab slave trade, the Atlantic slave trade, and the slave emancipation policies and movements in the 20th century.