Contemporary humanism entails a qualified optimism about the capacity of people, but it does not involve believing that human nature is purely good or that all people can live up to the Humanist ideals without help. If anything, there is recognition that living up to one's potential is hard work and requires the help of others. The ultimate goal is human flourishing; making life better for all humans, and as the most conscious species, also promoting concern for the welfare of other sentient beings and the planet as a whole. The focus is on doing good and living well in the here and now, and leaving the world a better place for those who come after. In 1925, the English mathematician and philosopher Alfred North Whitehead cautioned: "The prophecy of Francis Bacon has now been fulfilled; and man, who at times dreamt of himself as a little lower than the angels, has submitted to become the servant and the minister of nature. It still remains to be seen whether the same actor can play both parts".
What doesnt conetemporary humanism  believe about human nature?
purely good