Before performing a medley of his classic hits like “Higher Ground,” “Signed, Sealed, Delivered I’m Yours,” and “Overjoyed,” at the Global Citizen Festival, Stevie Wonder made a passionate speech about unity saying, “It is only through life we can make life happen through ourselves and each other.” He added, “Our global brothers and sisters, I didn't come here to preach, but I'm telling you, our spirits must be in the right place all the time.” After encouraging everyone…