Renaissance
Many argue that the ideas characterizing the Renaissance had their origin in late 13th-century Florence, in particular with the writings of Dante Alighieri (1265–1321) and Petrarch (1304–1374), as well as the paintings of Giotto di Bondone (1267–1337). Some writers date the Renaissance quite precisely; one proposed starting point is 1401, when the rival geniuses Lorenzo Ghiberti and Filippo Brunelleschi competed for the contract to build the bronze doors for the Baptistery of the Florence Cathedral (Ghiberti won). Others see more general competition between artists and polymaths such as Brunelleschi, Ghiberti, Donatello, and Masaccio for artistic commissions as sparking the creativity of the Renaissance. Yet it remains much debated why the Renaissance began in Italy, and why it began when it did. Accordingly, several theories have been put forward to explain its origins.
Harlem Renaissance
Certain aspects of the Harlem Renaissance were accepted without debate, and without scrutiny. One of these was the future of the "New Negro". Artists and intellectuals of the Harlem Renaissance echoed American progressivism in its faith in democratic reform, in its belief in art and literature as agents of change, and in its almost uncritical belief in itself and its future. This progressivist worldview rendered Black intellectuals—just like their White counterparts—unprepared for the rude shock of the Great Depression, and the Harlem Renaissance ended abruptly because of naive assumptions about the centrality of culture, unrelated to economic and social realities.