Full Idea
Slavery is a disgraceful crime.
Gist of Idea
Slavery is a disgraceful crime
Source
Baruch de Spinoza (The Ethics [1675], IVApp 21)
Book Reference
Spinoza,Benedict de: 'Ethics', ed/tr. White,WH/Stirling,AH [Wordsworth 2001], p.220
A Reaction
Note the date of this - when the slave trade is just getting going, and long before it is threatened or criticised.