"If in Mary Barton the bias is in favour of the working classes, it must be conceded that in North and South (published seven years later) the other side of the picture is shown. Mrs. Gaskell was still as full of sympathy with the labourer, but experience had taught her much. Still puzzled by seeing "two classes dependent on each other in every possible way, yet each evidently regarding the interests of the other as opposed to their own," she realised that the manufacturers, as a class, were not mere bloated capitalists, but level-headed, hard-working men, fighting against heavy odds for their livelihood. Also, she saw more clearly that the misery of the labourers was sometimes brought about by improvidence, and that much unhappiness was caused by the tyranny of the trades-unions of that day."