David, who has lived in the united states all his life, believes in giving highest priority to personal goals. he also defines himself mostly in terms of personality traits, and he values personal control and achievement. david ascribes to:

individualism.

Explanation:

Individualism refers to the philosophy or ideology of acknowledging the worth of an individual. It centers human individual around which other social elements revolves. It is a moral and social philosophy which gives priority to the individual over the social groups. The word is used at different times in different countries symbolizing different meanings. In the United States, it represents the ideas of personal freedom, limited government, and capitalism.

As per the question, David who gave the highest priority to personal gains and achievement reflects the ideals of individualism.