Explanation:

Let’s break this down:

- Between 1918 and 1920, Thomas and Znaniecki, in "The Polish Peasant in Europe and America," explored how individuals relate to society’s values and developed three basic personality 'ideals.'

- The first ideal is the over-conformist: someone who’s totally in agreement with society’s values—basically, they fit right in, maybe a little too well.

- Now, let’s look at those options:

- Bohemian: Usually a free spirit, non-conformist, does their own thing, kind of the opposite here.

- Altruist: Puts others before self. Not specifically about society's values—more about selflessness.

- Over conformist: This is the person who goes along 100% with society’s norms and values, sometimes to an extreme.

- Philistine: Often means someone uninterested in culture/art (not quite about conformity to social values in Thomas’s sense).

- So, the answer you want is Option 3 – Over conformist.

- Over conformist: always aligning with society's values, even at the cost of personal uniqueness.