Best explains the cause of civilizations being able to develop a division of labor

Which perminant civil rights leader would have disagreed most with washington's approach to solving the problem of racial inequality in the south?

What was piaget's explanation as to why preschool-age children in the preoperational stage make errors on tasks requiring conservation? a) preschool children's tendency toward centration prevents them from focusing on other relevant features of a situation b) preschool children have not yet developed numerical understanding; therefore, different amounts are meaningless c) preschool children's neural-visual network is not fully matured d) preschool children have not lived long enough and accrued enough experience to know the difference between quantities

In the 1950s and 1960s, chief justice earl warren was a strong advocate for?