No Longer at Ease is a story about an idealistic young man, Obi, who enters the workforce full of optimism, a strong moral compass, and good intentions—only to gradually lose his ideals and compromise on his morals. “The African is corrupt through and through,” says Mr. Green, the White European employer of the novel’s Nigerian protagonist, Obi, at the start of the novel. But the novel immediately reveals Mr. Green’s racist generalization to be patently untrue. Corruption is indeed endemic in Nigeria under British rule, but it's not because of the inherently corrupt nature of Nigerian people: rather, it is the consequence of generations of cronyism between colonial officials and self-interested local leaders willing to do whatever it takes to achieve success according to the terms set by the ruling English class. In other words, if Nigerian Civil Service workers engage in corruption (which they do), it is only because they have learned that it is what they must do to give back to their communities and be successful themselves as colonial subjects under British rule.
Obi has a stern moral disposition, and he begins his professional career vehemently against personally accepting bribes himself and against government corruption more broadly. He, like other like-minded idealists, believes that Nigeria can one day see a future free from corruption, once Nigeria achieves independence from English rule and the corrupt local leaders gradually die out. Though he begins his professional life with an idealist’s mindset and repeatedly rejects the frequent bribes he encounters on the job, Obi soon realizes that the constant bribes he encounters at work may be his only way to achieve upward mobility, to aid his community, and to stay afloat as he finds himself backed into a financial corner. At last, believing he has no other option, Obi compromises his moral integrity to the point where further bribery and corruption become unproblematic to him, and his moral corruption only ends when he is arrested in a sting operation. Ultimately, Obi’s trajectory illustrates the futility of trying to achieve success within a system that rewards corruption and implicitly punishes moral integrity.
Corruption ThemeTracker

Corruption Quotes in No Longer at Ease
‘What I can't understand is why people like you refuse to face facts.’ Mr Green was famous for speaking his mind. He wiped his red face with the white towel on his neck. 'The African is corrupt through and through.’
'Have they given you a job yet?' the chairman asked Obi over the music. In Nigeria the government was 'they'. It had nothing to do with you or me. It was an alien institution and people's business was to get as much from it as they could without getting into trouble.
‘Real tragedy is never resolved. It goes on hopelessly for ever. Conventional tragedy is too easy. The hero dies and we feel a purging of the emotions. A real tragedy takes place in a corner, in an untidy spot, to quote W. H. Auden. The rest of the world is unaware of it. Like that man in A Handful of Dust who reads Dickens to Mr Todd. There is no release for him. When the story ends he is still reading. There is no purging of the emotions for us because we are not there.’
'What an Augean stable!' he muttered to himself. 'Where does one begin? With the masses? Educate the masses?' He shook his head. 'Not a chance there. It would take centuries. A handful of men at the top. Or even one man with vision---an enlightened dictator. People are scared of the word nowadays. But what kind of democracy can exist side by side with so much corruption and ignorance? Perhaps a half-way house—a sort of compromise.' When Obi's reasoning reached this point he reminded himself that England had been as corrupt not so very long ago.
‘Our fathers also have a saying about the danger of living apart. They say it is the curse of the snake. If all snakes lived together in one place, who would approach them? But they live every one unto himself and so fall easy prey to man.’
You may cause more trouble by refusing a bribe than by accepting it.
Obi admitted that his people had a sizeable point. What they did not know was that, having laboured in sweat and tears to enrol their kinsman among the shining élite, they had to keep him there. Having made him a member of an exclusive club whose members greet one another with 'How's the car behaving?' did they expect him to turn round and answer: 'I'm sorry, but my car is off the road. You see I couldn't pay my insurance premium.'? That would be letting the side down in a way that was quite unthinkable. Almost as unthinkable as a masked spirit in the old Ibo society answering another's esoteric salutation: 'I'm sorry, my friend, but I don't understand your strange language. I'm but a human being wearing a mask.' No, these things could not be.
'Well then, what good have you done her?'
'Very little, I admit,' said Obi, trying to put his thoughts in order, 'but perhaps she will remember that there was one man at least who did not take advantage of his position.'
'But she probably thinks you are impotent.'
There was a short pause.
These thoughts gave Obi a queer kind of pleasure. They seemed to release his spirit. He no longer felt guilt. He, too, had died. Beyond death there are no ideals and no humbug, only reality. The impatient idealist says: 'Give me a place to stand and I shall move the earth.' But such a place does not exist. We all have to stand on the earth itself and go with her at her pace. The most horrible sight in the world cannot put out the eye. The death of a mother is not like a palm tree bearing fruit at the end of its leaf, no matter how much we want to make it so. And that is not the only illusion we have…
And we must presume that, in spite of his certitude, Mr Green did not know either.