A holiday developed by a Dr. Maulana Ron Karenga, a black militant, Marxist, and convicted felon. Just five years after this, he was convicted of torturing two black women to death. Observed from December 26 to January 1, Kwanzaa is based on a mixture of East African harvest rituals, called first fruits by Karenga and 1960's radicalism. This is in spite of the fact most slaves came from West Africa. Viewed as an alternative to Christmas, it, nonetheless, is based on race, and not in faith.
Josephine Garis Cochran was the first person to build a practical dish-washing machine, succeeding where some had tried and failed. And it was the chore of washing dishes by hand and trying to save her good china from breaking that caused her to proceed with an idea to invent a unique machine.
Alison Sperry. While detergent has not earned great acclaim in history, its development has made an impact in industry and also on how common household items are washed, especially dishes. The development of dishwashing detergent, along with the invention of the automatic dishwasher, revolutionized how dishes are cleaned.