Complex sentence: The Earthmen argue about what course of action they should take-they debate warning the current martians, given that their return to Earth depends on their goodwill, compared to the injustice suffered by the sleepers.
Split into simpler sentences: The Earthmen argue about what course of action they should take. They debate warning the current martians, given that their return to Earth depends on their goodwill, compared to the injustice suffered by the sleepers.