Thus, by 1800 fully one half of the total Brazilian population of 3,200,000 was slave, and by 1818 there were 1,930,000 slaves besides some 526,000 free Negroes and mulattoes, in all about sixty-three per cent of the total. By the middle of the nineteenth century there was something like three millions of slaves out of a population of seven and a half millions. Lord Palmerston estimated the total number of slaves in the sixties as being 3,000,000;whereas a writer in the “Revue des deux Mondes” puts the number between 2,500,000 and 4,000,000. Dawson quotes the number of slaves in 1856 as being approximately 2,500,000 or forty per cent of the total population. Apparently there is no actual census available on the number of slaves for this period. Needless to say, the slaves easily comprised from forty to fifty per cent of the population, and if we add all those of mixed blood we have a majority of the inhabitants of Brazil. [Fonte: http://en.wikisource.org/wiki/Brazilian_and_United_States_Slavery_Compared]
Aplicando o critério de Spock, temos que:
Em 1800, a escravidão era ótima.
Em 1856, idem.
Vale dizer, se você acredita neste “mantra”, cuidado…