A generalized introduction like this does not serve your thesis well. Better to begin with a personal anecdote or reflection.

Core values are the beliefs and principles that guide a person's choices in life and work. These values help reveal the kind of person they choose to be. Core values can be instilled as a person grows or are learned later in life. My core values have changed over the years as I have grown. The most important values that have remained consistent, despite the addition of others I have acquired throughout my career, are trust, family, and accountability.