What are the contrasting ideologies of Mr.Birling and the Inspector?

Priestly leaves us no doubt as to his own political ideology in this work. He embraces socialism, which is evident, particularly in his portrayal of the Inspector who is seen as a force for good. The inspector could be anyone. He's understated, dresses plainly, acts calmly, and always stays in complete control of the situation. He exemplifies fairness and equality..... he stands for the law.

Birling, on the other hand, is over the top. He's a capitalist, he's successful, and he strives to be evermore successful at what our author portrays as the expense of all others. Birling has a huge ego and places himself above others. He looks down on his workers and all those in lower social classes. Priestly's characterization of Birling is to make him a thoughtless and selfish man. The family is depicted as having a negative effect on the world around them. We could conceivably say he paints a picture of evil and cites capitalism as the root of all evil.