When we talk about the age of ignorance it usually reminds us of previous centuries particularly the period before Islam. But did only the people of those ages live in ignorance and the time of ignorance has expired once and for all?
To answer this question first we should find a reliable source which is definitely the Quran and the traditions of the infallibles and second we should define the word ignorant.
Ignorant is the opposite of rational. Man's behaviors are either based on reason or not. The behaviors which are based on the faculty of reason are called rational and the ones which are not based on reason and the intellect are described as ignorant. Therefor as long as man lives and he does not follow his intellect, ignorant behaviors will be unavoidable. Ignorance has different applications. Sometimes it means lack of knowledge, sometimes it means living in a primitive way, and sometimes it means the state in which crime, violence, prejudice and wrong customs spread in the society. Naming the a period before Islam as the time of ignorance is because ignorant behaviors were commonplace and widespread among people like an illness which afflicts an organism and there was no hope for a way out till Islam emerged and eradicated wrong customs.
The main characteristic of an ignorant society is that in such society people do not follow God but they follow their carnal desires and whims. The difference between the old ignorance and the modern one is that prior to Islam the ignorance of people resulted mainly from lack of knowledge but in today's world people in spite of great advances in technology and science yet more and more go deeper in the quagmire of worshipping self not God the Almighty. In the first ignorance if one could kill innocent people one at a time but now by pressing one button one can kill thousands of innocent people at the length of a moment. In the first ignorance if women did not cover their body properly now some people appear in front of the camera without clothes on and without even a bit of shame put it on the internet or broadcast it on satellites. In the first period of ignorance if some people buried their children alive now thousands of people abort their child and deprive it of the basic right of every human to live. So, which one of these two periods of ignorance is more grave, the one before Islam or the one which is contemporary?
 Al-Ahzab:33, وَلَا تَبَرَّجْنَ تَبَرُّجَ الْجَاهِلِیَّةِ الْأُولَىٰ.
 Shaikh Ali al-Kurani al-Amili, Mu'jam Ahadith al-Imam al-Mahdi, Vol. 1, p. 44, بُعثتُ بین جاهلیتَین الأخراهما شَرَّ مِن أولاهما.
 Like what happend in Hiroshima and Nagasaki during World War II (1939-45).