4 ms·

The US made slave importation illegal in 1808 -- [1] though see [2]. The slaves in the US between then and the civil war were mostly born here. There is also

by dzdt 8y ago

The US made slave importation illegal in 1808 -- [1] though see [2]. The slaves in the US between then and the civil war were mostly born here. There is also a data issue. The graphs are generated from US census information. The census first asked nation of origin for free persons starting in 1850. The only census asking nation of origin for slaves was 1860. [1] https://en.m.wikipedia.org/wiki/Act_Prohibiting_Importation_of_Slaves https://en.m.wikipedia.org/wiki/Act_Prohibiting_Importation_... [2] https://en.m.wikipedia.org/wiki/Clotilda_(slave_ship) https://en.m.wikipedia.org/wiki/Clotilda_(slave_ship)

mirimir 8y ago
Even though this is about immigration, TFA does note: > Tree rings that are nearly circular indicate that population growth due to immigration was much less significant than that due to natural-born persons. And I missed that census data is the source. Because at 100% in Firefox, the relevant paragraph ends: > The data was queried from IPUMS-USA and consists of millions of samples of questionnaires from U.S. At 110%, I see that it's actually: > The data was queried from IPUMS-USA and consists of millions of samples of questionnaires from U.S. Censuses. So yeah, I guess that census data didn't include slaves.