Author Tochi Onyebuchi says that a majority of space stories he's come across favor those in power. Rich and white people get to escape in spaceships, whereas less affluent Black and brown people are left behind on an increasingly inhabitable Earth. His new science-fiction novel Goliath gets at this power imbalance, and the author spoke to Juana Summers about how it tells us so much about racial and economic disparities right now.