The passage is about the political and civic organization of ancient cities. It states that some ancient cities were organized along egalitarian lines, without any indication of temples or palaces (which suggests a lack of a ruling class or administrators), and that in other cities, temples and palaces never emerged at all. Option D correctly summarizes this information by stating that there was evidence of an egalitarian urban life in some ancient cities, where the political and civic organization was less hierarchical. Option A is incorrect because it only mentions the absence of temples and palaces, but does not mention the fact that some ancient cities were organized along egalitarian lines. On a similar note, Option B presents an exaggeration by suggesting that 'all' ancient cities were organized along egalitarian lines, which is not stated in the passage. Option C is also inaccurate since it asserts that ancient cities were transformed from egalitarian to hierarchical, but the passage only states that some ancient cities were egalitarian and does not mention any transformation. Hence, Option D is the correct choice.