America's tech giants are taking a modern-day crash course in India's ancient caste system, with Apple (AAPL.O) emerging as an early leader in policies to rid Silicon Valley of a rigid hierarchy that's segregated Indians for generations. … …U.S. discrimination laws…do not explicitly ban casteism. … …the first U.S. employment lawsuit [filed by California] about alleged casteism - has forced Big Tech to confront a millennia-old hierarchy where Indians' social position has been based on family lineage, from the top Brahmin "priestly" class to the Dalits, shunned as "untouchables" and consigned to menial labor. … Since the suit was filed,...