In 1740 Amo took up a post in philosophy at the University of Jena, but while there he experienced a number of changes for the worse. The Duke of Brunswick-Wolfenbüttel had died in 1735, leaving him without his long-standing patron and protector. That coincided with social changes in Germany, which was becoming intellectually and morally narrower and less liberal. Those who argued against the secularisation of education (and against the rights of Africans in Europe) were regaining their ascendancy over those who campaigned for greater academic and social freedom, such as Christian Wolff.