What are examples of uneducated public and the fear of external enemies in Animal Farm by George Orwell?

The pigs learned to read by themselves.  Therefore, when it comes to education, they were at the top.  The other animals did not care about education.  The dogs learned to read, but they did not think reading was important. Benjamin could read, but he also did not care. The other animals never learned to read.  Here is a quote that explains the situation.

Clover learnt the whole alphabet, but could not put words together. Boxer...

The pigs learned to read by themselves.  Therefore, when it comes to education, they were at the top.  The other animals did not care about education.  The dogs learned to read, but they did not think reading was important. Benjamin could read, but he also did not care. The other animals never learned to read.  Here is a quote that explains the situation.

Clover learnt the whole alphabet, but could not put words together. Boxer could not get beyond the letter D. He would trace out A, B, C, D, in the dust with his great hoof, and then would stand staring at the letters with his ears back, sometimes shaking his forelock, trying with all his might to remember what came next and never succeeding.

Based on these words, we can say that public education was low.  The implication of this is that the animals could be swayed in various ways, because they could not see outside the matrix that the pigs created. 

The other corollary to the lack of education is fear.  The pigs were able to control the animals with the fear of Mr. Jones coming back. In one context, the pigs took the milk and apples for themselves. When it was discovered that they did this, they justified it by saying that they needed these for their brains.  The alternative would be the pigs failing in their jobs. If this happened, Jones would come back. Here is what Squealer says:

It is for your sake that we drink that milk and eat those apples. Do you know what would happen if we pigs failed in our duty? Jones would come back! Yes, Jones would come back! Surely, comrades,’ cried Squealer almost pleadingly, skipping from side to side and whisking his tail, ‘surely there is no one among you who wants to see Jones come back?’

In short, fear was a powerful tool in the hands of the pigs.