Write and present a historical background of business ethics, and then evaluate and measure the ethical system of Walmart, Amazon and Apple:

1) What each company does?

2) What are the ethical systems of each organization are and their code of ethics?

3) How each company evaluates and measures its ethical systems?

4) How each company impacts the community or communities in which it operates or is located?.

After all of the information has been gathered, compare and contrast the companies and assess a conclusion on how ethically effective or ineffective each company operates?