What is the theme of short story Appointment at Noon by Eric Frank Russell?

"Appointment at Noon" presents a thought-provoking theme that raises questions about the ethics and consequences of advanced interstellar travel. Russell explores the moral dilemmas and potential existential threats posed by advanced civilization's manipulation of time and reality for convenience and comfort.

The story underscores humanity's quest for speed, ease, and convenience, but warns of the unintended and perilous consequences of using advanced technology without considering the wider impact. Through the character of Sir Robert, Russell challenges readers to reflect on their own behaviors and the potential price they may pay for convenience at the expense of ethical considerations.