Lionel should use 'Consequently' as the transitional word in the paragraph to show the cause-and-effect relationship.
Consequently should be the transitional word Lionel should use in this paragraph. This is because the sentence following the transition talks about the greatness of Ancient Greek culture being measured by its contributions to human progress. By using 'Consequently,' Lionel can effectively show the relationship between the greatness of Ancient Greek culture and its contributions.
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