Morton's review:

Weaver was a professor of rhetoric at the University of Chicago.  Ideas Have Consequences, like Weaver's other books, is small but deep.  It brilliantly diagnoses what ails modern man, tracing the illness to its root, the flight from faith.
According to Weaver's friend Russell Kirk, the publisher imposed the title, which Weaver hated, on this book. 

My one problem with the book is that its title is used as an incantation by some conservative intellectuals who insist that being right, in the sense of being correct, is sufficient to win.  To support their position, they utter the words:  'Ideas have consequences,' thinking that by so doing they have enlisted Richard Weaver on their side and thereby absolved themselves of any obligation to take effective actions. 

Once you have read the book, you will know that Weaver didn't believe that ideas in and of themselves have consequences.  He believed that skillful actions, when based on good ideas, have good consequences.