Lisbon MadridGlasgow
Edinburgh
CambridgeGreenwichLondon LeidenAmsterdamCopenhagenUppsala
StockholmSt. PetersburgDanzigBerlin WarsawViennaVenice
Bologna
Florence
Rome
NaplesPisaGenevaStrasbourgLeipzigHalleGöttingenVersaillesParisTurinCorsicaSardiniaSicilyBalearicIslandsSeaMediterraneanEbro
R.Loi
re
Atlantic R.
OceanArctic OceanNorth
SeaDanube R.0 300 600 Miles0 300 600 900 KilometersPalaces modeled
after Versailles
Important universities
Famous European
academic centersPublication of scientific
or philosophical journals
Location of
observatories378Chapter 20
literate population and the influence of these ideas in
changing the Old Regime. The central ideas of the
Enlightenment are frequently simplified to a few
basic concepts. The philosophes often differed, but a
few concepts were nearly universal: (1)skepticism—
questioning the validity of assumptions about society
and the physical world without regard for traditional
authority; (2) belief in the existence of natural laws—
such as the law of gravity—that govern both the social
and physical worlds; (3) confidence that human reason,
rigorously applied, can discover these natural laws and
establish them as the basis of human activity; and
(4) optimism that the application of reason and obedi-
ence to natural laws will produce progress,leading to the
perfection of human institutions.
One of the most eminent German philosophes, Im-
manuel Kant, summarized many of these attitudes in an
essay of 1784 entitled “What Is Enlightenment?” His
definition of Enlightenment was the liberation of indi-
viduals from direction by others (see document 20.1).
Kant held that people achieved this liberation when
they resolved to use their reason and to follow its dic-
tates. Thus, he suggested a Latin motto for the Enlight-
enment: Sapere aude!(literally, “Dare to know!”), whichMAP 20.2
The Enlightenment