When, in 1726, Voltaire is released from the Bastille (where he had been sent following an altercation with the 'chevalier' de Rohan) he was still not welcome in France and so was sent to England. Whatever! Undeterred, he had, anyway, enough of the pettiness of France and its censorship culture, where people ruled simply thanks to their questionable 'birth right'. He will go, and will bother to come back only two years later -in 1728.
His exile was short, but highly informative.
In these 'philosophical letters' (sometimes published under the title 'English letters') he offers about twenty letters or so to expose why England, at the time, rightly make the admiration of many. A constitutional monarchy, a better religious tolerance, a flourishing trade... The parallels with a France subjected to absolutism, bigotry, and economical hardships make for a stark and highly critical contrast! Claiming his admiration for Bacon, Locke, and Newton, he also dare to use such great intellectuals to severely criticise French philosophers such as Descartes and Pascal.
Politics, religion, philosophy, science, and, even, literature (Shakespeare, Alexander Pope...) the author does more that to portray a foreign nation: he punches a devastating uppercut right into the face of his own. Voltaire strikes again!
The establishment of the time had sent him to England to teach him a lesson. Well, he learnt more than one, and these were ones they certainly didn't expected! He came back more impertinent (yet challengingly relevant) than ever, and it makes for a strong criticism of what France was pre-Revolution. Brilliant.