Paragraph 1 emphasizes the following about Lester B. Pearson C that he served the country in many different roles
What is the emphasis?
The emphasis is on the fact that Lester B. Pearson served the country in many different roles. In this case, he delivers a rare gem to a chemist who made important discoveries about the gemstone.
So, the man, Lester Pearson served his country in very different capacities. He was an academician, and leader and he played a vital role in the discovery of precious stones like the one above.