Have Muslims ever contributed anything good to human civilization?

From time to time, I read claims that Islam and Muslims have contributed absolutely nothing to world civilization beyond terror and oppression.  Sometimes — to my considerable astonishment — such assertions are sent to me directly.

A week or so ago, one poster online explained that the golden or classical age of the Arabs (which extended, arguably, from around 800 AD until the Mongol conquest of Baghdad in 1258 AD, and which was overwhelmingly propelled by Muslim thinkers, scientists, poets, and scholars) came to an end when Muhammad (570-632 AD) introduced his new religion of Islam.  (Another online commenter explained that, until roughly the nineteenth century, Egypt was 90% Christian.  Actually, though, Egypt was majority Muslim by the mid-tenth century.)

Anyhow, much could be written about the claim that Muslims and Islam have offered nothing but evil to the world.

For tonight, however, I’ll content myself with the image above.  It should be sufficient refutation by itself, no further comment required.