Laughter is a significant topic for Renaissance and seventeenth‐century philosophers. Still, the latter rarely approved of laughter but endorsed it as useful mockery for theological or philosophical purposes. Benedict Spinoza’s view of laughter stands out as an exception to this attitude as well as to previous and later ones. Spinoza differentiates between mockery and laughter, denounces the former as evil, and characterizes the latter as “pure joy”: laughter is about oneself rather than another and originates in noticing something good, rather (...) than base or ugly. In contrast to melancholy, cheerfulness is “always good” and is a precondition of our liberation as it furthers the use of reason. Not only is Spinoza’s view original, but it is an important source of the eighteenth‐century notions of good‐natured laughter and good humor through a more than probable influence on their proponent, the Earl of Shaftesbury. Whilst Spinoza’s view of cheerfulness is briefly addressed in recent studies, his view of laughter goes unnoticed in most commentaries and is misrepresented in humor studies. Contrary to what is assumed in the philosophy of laughter, I argue that the most important defense of laughter comes not from a British Enlightenment thinker, but from the Dutch Jewish seventeenth‐century philosopher. (shrink)