Answer:
In other words, Arthur Renway is the one who loves his fellow humans.
Explanation:
A philanthropist is the one who is involved in the betterment of humanity. For example in terms of giving charity which would help other humans. It can also be donating money to those in need or doing good deeds for other human beings.
Therefore, in the above sentence, Arthur Renway is known for his philanthropy because he has a giving nature and loves his fellow humans.
