The long reign  of Louis XV (1715-1774) began on a period of relative peace that allowed a population expansion (about 24 million French in 1725) accompanied by economic growth and the first effects of the Enlightenment in the Science: medical progress reducing mortality, improving agricultural yields, improving communication routes in the kingdom, beginning of the development of artisanal and industrial production. Thus the king of France Louis XV, nicknamed the beloved is a popular king at the beginning of his reign. His personal involvement in the conflict of the Austrian succession even reached the peak of this popularity in 1744-1746. But from 1747-1748, poor harvests associated with the misperception of the Treaty of Aix La Chapelle that ended the war of succession in 1748 caused a reversal of this popularity. In fact, only the Kingdom of Prussia can be considered as beneficiary of this treaty. The War of Austrian Succession also has repercussions on the English economy.
- The Enlightenment  and enlightened Europe appear in their diversity (across Europe). Unequal economic development, variety of social structures introduce chronological shifts and ideological variations. Early Enlightenment here, and there later, as Western Europe moves towards the east or the south, leading here to a liberal political practice, sometimes to the utopian egalitarian or communist, there on the practice authoritarianism of enlightened absolutism. Atheists, deists and believers are neighbors: there was a Catholic Aufklärung. The Enlightenment did not freeze in dogma or creed. They affirmed a certain number of ideals that were flexible enough to respond to different families of mind, to various national requirements. Enlightenment, Lumières, Aufklärung, ilustraciòn, illuminismo: so many geographically and chronologically irreducible national realities, each having its own vision, its particular collaboration. « French Europe in the Age of Enlightenment », it has often been said: it is impoverishing the richness of the time, underestimating its complexity, reducing Europe to its princely courts and its social elites. No doubt France served as a relay between England and the continent, the French Enlightenment shone on Europe’s brightest.
At the end of the century, the attraction will turn into defense reflex. The most « luminous » representatives of the Enlightenment in France are Voltaire, Diderot, d’Alembert, Rousseau and Montesquieu. Voltaire is still influenced by Leibniz’s theory of « the best new world », the Lisbon earthquake will only take place in the next generation. At the present generation, the Enlightenment’s reflection is rather favorable to a real cohabitation, a precursor to the integration of Jews in nineteenth-century Europe. As Montesquieu puts it in « Les Lettres Persanes (Persian Letters) » (published anonymously in 1721 in Amsterdam):
- You ask me  if there are Jews in France? Know that wherever there is money, there are Jews. You ask me what they do? Precisely what they do in Persia; nothing is more like an Asian Jew than a European Jew. They make appear among the Christians, as among us, an invincible obstinacy for their religion, which goes to madness.
- The Jewish religion is an old trunk that has produced two branches that have covered the whole earth, I mean Mahometanism and Christianity; or rather, it is a mother who has begotten two daughters who have overwhelmed her with a thousand wounds; because in fact of religion, the nearest ones are the greatest enemies. But, having received some ill-treatment, she does not fail to boast of having given them birth; she uses both to embrace the whole world, while on the other hand her venerable old age embraces all time.
- The Jews, therefore, regard themselves as the source of all holiness and the origin of all religion; on the contrary, they regard us as heretics who changed the law, or rather as rebellious Jews.
- You make  us die, we who believe only what you believe, because we do not believe everything you believe. We follow a religion which you yourself know to have been formerly dear to God; we think that God still loves him, and you think he does not love him anymore; and because you judge so, you make those who are in this forgivable error believe that God still loves what he loved, by fire and fire.
The utopia of a better world, a more fraternal and just humanity that feeds this generation and is a forerunner of the French Revolution, the emancipation of the nineteenth century, but which will not prevent the return to the old demons in the twentieth century, is evoked by the psalmist in the psalm of this generation:
(extract of the psalm 133 associated to this generation, verse 1 )
- A song of ascents of David. Behold how good and how pleasant it is for brothers also to dwell together!
The length of the psalm of this generation is exceptionally short in the image of the narrow hope that rests on the current of the thinkers of this generation.
- Two  currents of renewal crossed Judaism in the eighteenth century.
(extract of the psalm 133 associated to this generation, verse 2 and 3 with reminder of verse 1 )
- (A song of ascents of David. Behold how good and how pleasant it is for brothers also to dwell together!)
- As the good oil on the head runs down upon the beard, the beard of Aaron, which runs down on the mouth of his garments.
- As the dew of Hermon which runs down on the mountains of Zion, for there the Lord commanded the blessing, life forever.
 According to (directed by) Jean Delumeau: « History of the world, from 1492 to 1789 ». Chapter: « Louis XV – The Beloved » (French: « Histoire du monde, de 1492 à 1789 ». Chapitre : « Louis XV- Le Bien Aimé » (p. 402 à 405) )
 (collective) A. Soboul: « The Age of Enlightenment – The Rise, 1715-1750 ». Chapter: « The Enlightenment Philosophy ». (French: « Le siècle des Lumières – l’essor, 1715-1750 ». Chapitre : « La philosophie des Lumières ». (p. 377/378) )
 Passage of the « Persian Letters » (chapter LX) of Montesquieu selected by Leon Poliakov: « History of antisemitism, 2 – The age of science ». Chapter: « The Age of Enlightenment ». (French: passage des « Lettres persanes » (chapitre LX) de Montesquieu sélectionné par Léon Poliakov : « Histoire de l’antisémitisme, 2 – L’âge de la science ». Chapitre : « Le siècle des Lumières ». (p. 26/27) )
 Passage of « Spirit of Laws » (chapter XXV, 13) of Montesquieu selected by Leon Poliakov: « History of antisemitism, 2 – The age of science ». Chapter: « The Age of Enlightenment ». (French: passage de « Esprit des Lois » (chapitre XXV, 13) de Montesquieu sélectionné par Léon Poliakov : « Histoire de l’antisémitisme, 2 – L’âge de la science ». Chapitre : « Le siècle des Lumières ». (p. 28) )
 (collective) A. Soboul: « The Age of Enlightenment – The Rise, 1715-1750 ». Chapter: « God and the process of revelation ». (French: « Le siècle des Lumières – l’essor, 1715-1750 ». Chapitre : « Dieu et le procès de la révélation». (p. 463/464) )