What is Bradbury implying about the effects of colonization on the native culture and population of an invaded area?

What are some of the negative effects of colonization on the planet Mars? Are there any positive effects, and if so, what are they?

In the story "And the Moon Be Still and Bright," Spendor expresses his opinion that the Martians hate Earth beings for invading their planet. Captain Wilder believes the Martians would view them as children who do not know better. Who do you think is correct?

In "The Third Expedition," the explorers are lured into a Martian town by the image of deceased family members. At first, everything seems to be peaceful, but at night, when the men contemplate the reality of the situation and become afraid, they are killed. Do you believe the Martians lured the men to their deaths, or that...