A few signs indicating one is living in an Age of Ignorance:

They (people) did not take light from the lights of his wisdom nor did they produce flame from the flint of sparkling knowledge . So in this matter they are like grazing cattle and hard stones. Nevertheless, hidden things have appeared for those who perceive, the face of right has become clear for the wanderer, the approaching moment has raised the veil from its face and signs have appeared for those who search for them.

What is the matter with me! I see you just bodies without spirits and spirits without bodies, devotees without good, traders without profits, wakeful but sleeping, present but unseen, seeing but blind, hearing but deaf and speaking but dumb.

I notice that misguidance has stood on its centre and spread (all round) through its off-shoots. It weighs you with its weights and confuses you with its measures. Its leader is an out-cast from the community. He persists on misguidance. So on that day none from among you would remain except as the sediment in a cooking pot or the dust left after dusting a bundle. It would scrape you as leather is scraped, and trample you as harvest is trampled, and pick out the believer as a bird picks out a big grain from the thin grain.

Where are these ways taking you, gloom misleading you, and falsehoods deceiving you? Whence are you brought and where are you driven? For every period there is a written document and everyone who is absent has to return. So listen to your godly leader and keep your hearts present. If he speaks to you be wakeful. The forerunner must speak truth to his people, should keep his wits together and maintain presence of mind. He has clarified to you the matter as the stitch-hole is cleared, and scraped it as the gum is scraped (from the twigs).

Nevertheless, now the wrong has set itself on its places and ignorance has ridden on its riding beasts. Unruliness has increased while the call for virtue is suppressed. Time has pounced upon like a devouring carnivore, and wrong is shouting like a camel after remaining silent. People have become brothers over ill-doings. have forsaken religion, are united in speaking lie but bear mutual hatred in the matter of truth.

When such is the case, the son would be a source of anger (instead of coolness of the eye to parents) and rain the cause of heat, the wicked would abound and the virtuous would diminish. The people of this time would be wolves, its rulers beasts, the middle class men gluttons and the poor (almost) dead. Truth would go down, falsehood would overflow, affection would be claimed with tongues but people would be quarrelsome at heart. Adultery would be the key to lineage while chastity would be rare and Islam would be worn overturned like the skin.

-Commander and Chief of Believers, Ali ibn Abi Taleb, peace be upon him