Are we all rationally calculating, rational egoists?

Are we all rationally calculating,  rational egoists?
In fact, a lot of the problems that befall human beings, according to Hobbes, result from their being too little concerned with self-interest. 

Too often, he thinks, we are too much concerned with what others think of us, or inflamed by religious doctrine, or carried away by others’ inflammatory words. This weakness as regards our self-interest has even led some to think that Hobbes is advocating a theory known as ethical egoism. 

This is to claim that Hobbes bases morality upon self-interest, claiming that we ought to do what it is most in our interest to do. But we shall see that this would over-simplify the conclusions that Hobbes draws from his account of human nature.

This is Hobbes’s picture of human nature. We are needy and vulnerable. We are easily led astray in our attempts to know the world around us. Our capacity to reason is as fragile as our capacity to know; it relies upon language and is prone to error and undue influence. When we act, we may do so selfishly or impulsively or in ignorance, on the basis of faulty reasoning or bad theology or others’ emotive speech