parents in poor neighborhoods are more likely to experience depression, stress, and illness, which in turn “are associated with less warm and consist… - Robert D. Putnam

we tend not to begrudge others their success or care how high the socioeconomic ladder is, assuming that everyone has an equal chance to climb it, given equal merit and energy.

The achievement gap between children from high income and low income families is roughly 30-40% larger among children born in 2001 than among those born 25 years ago. The class gap among students entering kindergarten was two to three times higher than the racial gap.

These two types of equality are obviously related, because the distribution of income in one generation may affect the distribution of opportunity in the next generation — but they are not the same thing.