In March 1831, widespread unrest in Rio de Janeiro culminated in an event known as the "Night of Bottles." This unusually long five-day riot, characterized by protesters throwing bottles, eroded the emperor's authority and forced him to abdicate.

Anti-slavery movements thrived in 'societies with slaves,' like Pennsylvania, rather than 'slave societies,' like Barbados. In Pennsylvania, slavery existed, so people were confronted with its morality, but the economy wasn't dependent on it. This allowed for questioning without risking the collapse of the entire socio-economic order.

A controlled study found that after removing infant mortality, assassinations, and battle deaths, the average Roman male lived 75-80 years. This is comparable to the modern US average, questioning the narrative that modern medicine has dramatically extended our natural lifespan.

The profound instability and societal fractures caused by slavery made it impossible for Brazilians to agree on a collective national story. As a result, their national anthem existed as only a musical tune for over 40 years, lacking any official unifying words.

Even if slavery became inefficient for industrial production, its core appeal is its malleability. Throughout history, it has served timeless human desires for sexual exploitation, luxury status symbols (owning people), loyal servants, and even government bureaucrats. This adaptability makes it a threat in any economic system, including modern ones.

Bryan Stevenson argues that beyond the physical brutality, slavery's most damaging legacy is the narrative of racial difference created to allow enslavers to see themselves as moral. This ideology of racial hierarchy persists today, enabling moral disengagement and perpetuating injustice.

During the American Revolution, Britain and the colonies used slavery to attack each other's character. Each side accused the other of hypocrisy without any genuine commitment to abolition. This political mud-slinging was crucial because it transformed slavery from a normal fact of life into a blameworthy, immoral act in the public consciousness.

The idea that growing wealth and education automatically lead to more compassionate values is historically false. Wealthy societies, from the Roman Empire to 18th-century Europe and Belle Époque France, have often been the most deeply committed to slavery and colonialism, using their resources to create more efficient systems of oppression.

Nearly half of all West African slaves transported across the Atlantic ended up in Brazil, making slavery the defining institution of its history, even more so than in the United States. This reality profoundly shaped its demographics and social fabric.