The film is divided into a 3 act structure. The 1st act would be best described as modernity. We focus in on products of our era hightened to the extreme. They trade on beauty, models and social media influencers. Theyre vapid, shallow and dim. And the film rips them to shreds.
The 2nd act sees our leading couple onto a cruise with the most affluent. The most powerful. Their beauty is no longer the tradable commodity it was but its not without value. Still next to the rest of their shipmates theyre small potatoes.
This section could most aptly be described as capitalism. And like before its a scathing critique. It doesnt offer any counter point, its teeth are out and it attacks without mercy.
The third section sees our cast shipwrecked. Neither beauty nor currency are useful any longer. Only 1 survivor has any usable skills and she uses her skills for the good of this small society. Making fires and catching fish. Keeping them going. But she uses this "altruism" to take power and becomes a dictator making dogs of them all.
This section could be called communism. And its just as critical as any section before.
A lesser film, a more modern film, would not have included this 3rd act. Its in its inclusion that the film becomes interesting. Its where its dialogue exists. In its closing moments it raises the question "which of these societies is worth holding on to?" It deliberately doesnt answer and it deliberately doesnt paint any in a positive light. It shows them at their worst examples and rolls around in the filth.