I'd like some fleshing out as to what this bit means.
Ok, I'll try.
The first thing to do is to look at groups of individuals that are not self-aware, and see how their behaviour is regulated. Within groups, social controls such as hierarchies exist, but also innate controls such as deer not fighting to the death over females, for instance. This latter is not learned behaviour.
Many culturally determined norms of behaviour, including moral codes such as the 10 commandments, can be understood as a means of controlling behaviour where self-aware individuals are presented with choices. This is learned behaviour, and in many cases it is in fact an extension of what would have been innate behaviour were they not self-aware – basically, we are, to a large extent, inclined towards obeying the law.
As I outlined, there is a possible mechanism in this process by which innate behavioural controls are replaced by/reinforced by learned controls whereby the innate controls become weakened within a population over time. This could lead to a tightening and distortion of the learned controls – quite possibly to such an extent that their origin as a replacement for innate controls becomes obscured.
This model allows for examples of social controls that are entirely new to self-aware individuals, and have been produced precisely by the problems self-awareness throws up – how to deal with knowledge of one's own mortality, for instance.
Other 'new' problems may be caused by our cleverness, which has vastly greater possibilities of expression because of the feedback system that is self-awareness and what Damasio calls 'extended consciousness' (we're not just conscious over a narrow range of time, but also of ourselves as beings extended over time in a world extended over time). At the very least old problems, such as regulating power within the group, will need new solutions. Again, as societies become more complex, the origin of a particular learned behavioural control may be very obscure.