Greece

WTF happened?

Plebs

The Sodom and Gomorrah thing, part 2.

waves of invasion of 'inferior' people by pretentious standards

but might makes right

Hello, Trasimachus

infinite wisdom can be destroyed by the dumbest of savages

sad, really.

Is it really wisdom if it isn't even capable of memetic success?

ISIS is coming for you.

ISIS is pretty much a symptom of the decline of Islam. Violent, panicked death throes.

Hedonistic consumerism is too enticing for religious extremism to compete with on any meaningful scale. They have already lost.

nothing happened. they were just comfy and had values that lead to accomplishment. obviously they weren't that smart since they lacked the discipline to maintain it. they serve as an excellent example of what to strive for and what to avoid.

>a centuries-long history of nearly constant warfare

>comfy

Christianity.

ISIS is a sign of globalisation and the decay of western culture

Islam is the fastest growing relgion and the religion with the most practicing followers

>get conquered by Rome
>never reassert their own culture and just get so used to the Roman boot on their neck they start identifying as Romans
>"Guys the western empire may have fallen, and Rome might be in the hands of Barbarians, and technically we might have been ruled by a separate emperor for a long time now, but this is still the ROMAN empire dammit. In fact, you could say we're the only Romans left! WE ROME NOW!"
>Also: BANKING RULES
And so, the Greeks never produced any literature or philosophy of worth ever again.

They got lost in India.

>WTF happened?

Cross-boy and the Cockroaches happened (great band name, btw).

Overspending and austerity.

R O M E
O
M
E

this is the answer

You are right, phrasing it as the 'decline of religion' would be more appropriate. Sure, Islam is growing when compared to other religions, but that doesn't mean much.

Same thing that always happens.

Persians, then Macedonians, then Romans, then Muslims, to be tl;dr about it.