Massive and brilliant book ... Israel displays a profound, and contagious, sympathy for the intellectual movement he describes ... Israel has given us a vast panorama of the unfolding of Enlightenment thought during the crucial century between 1650 and 1750 ... The book is a real tour de force ... magisterial.
History Workshop Journal
A brilliant achievement, piecing together some highly elusive strands of the early enlightenment in a way which not only makes compulsive reading, but is also bound to have a major and permanent impact on enlightenment scholarship as a whole.
English Historical Review
This book gives the early radical enlightenment a clarity and power which historians of the early modern period will find impossible to ignore.
English Historical Review
As a formidably well-researched history of radical thinking from the mid-seventeenth century through to the French Revolution, and of the scholars who confronted each other at the time in sometimes ferociously bitter disputes, this book has no rival.
English Historical Review
In an age of historical miniaturists, it is exhilarating to encounter a scholar who is willing to cover walls and ceilings with a magnificent sprawling historical fresco. Israel has put forward a Grand Historical Thesis of the sort that historians once revelled in, but that has largely gone out of style. He has done so, moreover, with panache and in detail, revealing a command of texts and archival documents, local milieux and international currents, that compels admiration Radical Enlightenment swarms with fascinating material of every sort, so rich and varied that no review can do it justice.
Anthony Grafton, Times Literary Supplement
Radical Enlightenment deserves to be widely read because it is an example of ground-breaking, vastly well-informed and thoroughly new history.
David Horspool, The Guardian
Jonathan Israel's ardour, erudition and willingness to challenge widely accepted notions make his book a great achievement - one that entitles him to the gratitude of the entire world of learning.
Times Literary Supplement
Magnificent and magisterial, Radical Enlightenment will undoubtedly be one of the truly great historical works of the decade.
John Adamson, Sunday Telegraph
Magnificent ... sumptuous in the energy, clarity, and of the breadth of its scholarship ... [A] masterpiece.
LA Times
Remarkable historical study ... the author succeeds in turning a mountain of evidence into crisp, fresh prose.
Out of the Pen
That Israel has taken so much learning and compressed it into such an informative and stimulating read is a remarkable achievement ... The book must be considered the standard by which future histories of philosophy will be measured.
The Philosophers' Magazine
We have gained a much more detailed and fine-grained view of the sheer diversity and intellectual creativity not just amongst those who may have been influenced by Spinoza, but also amongst their critics, and those who may be deemed part of either the moderate Enlightenment or even a Counter-Enlightenment.
Professor Thomas Munck, Reviews in History