Step 1: Analyze the roots of the words.
The word "philanthropist" comes from Greek roots: "phil-" (love) and "anthropos" (humanity). Thus, it literally means "lover of humanity".
Step 2: Define the options.
Misanthropist: A person who dislikes humankind.
Philanderer: A man who readily or frequently enters into casual sexual relationships with women.
Philanthropist: A person who seeks to promote the welfare of others, especially by the generous donation of money to good causes.
Platonic: (of love or friendship) intimate and affectionate but not sexual.
Step 3: Match the definition.
The definition of "philanthropist" directly matches the given expression.