Albert Camus' ideas on the Absurd

In his essays Camus presented the reader with dualisms: happiness and sadness, dark and light, life and death, etc. His aim was to emphasize the fact that happiness is fleeting and that the human condition is one of mortality. He did this not to be morbid, but to reflect a greater appreciation for life and happiness. In Le Mythe, this dualism becomes a paradox: We value our lives and existence so greatly, but at the same time we know we will eventually die, and ultimately our endeavours are meaningless. While we can live with a dualism (I can accept periods of unhappiness, because I know I will also experience happiness to come), we cannot live with the paradox (I think my life is of great importance, but I also think it is meaningless). In Le Mythe, Camus was interested in how we experience the Absurd and how we live with it. Our life must have meaning for us to value it. If we accept that life has no meaning and therefore no value, should we kill ourselves?
Meursault, the Absurdist hero of L'Étranger, has killed a man and is scheduled to be executed. Caligula ends up admitting his Absurd logic was wrong and is killed by an assassination he has deliberately brought about. However, while Camus possibly suggests that Caligula's Absurd reasoning is wrong, the play's anti-hero does get the last word, as the author similarly exalts Meursault's final moments.
Camus' understanding of the Absurd promotes public debate; his various offerings entice us to think about the Absurd and offer our own contribution. Concepts such as cooperation, joint effort and solidarity are of key importance to Camus.
Camus made a significant contribution to a viewpoint of the Absurd, and always rejected nihilism as a valid response.

"If nothing had any meaning, you would be right. But there is something that still has a meaning." Second Letter to a German Friend, December 1943.

What still had meaning for Camus is that despite humans being subjects in an indifferent and "absurd" universe, in which meaning is challenged by the fact that we all die, meaning can be created, however provisionally and unstably, by our own decisions and interpretations.