Humans.
"Evolution is the ultimate example of how much a simple learning algorithm can achieve given enough data. Its input is the experience and fate of all living creatures that ever existed. (Now that's big data.) On the other hand, it's been running for over three billion years on the most powerful computer on Earth: Earth itself." Pedro Domingos: The Master Algorithm
As the only known beings able to comprehend, humans are privileged to be able to appreciate unfolding evidence of the awesome scale of the universe, the natural world, and of deep history. Religion and its imaginary god(s) have held us back and could lead to our destruction. The future is up to us. https://gopiswrong.net/religion.htm
... the goal of science is not universal truth. Rather,...the modest but relentless goal of science is the gradual removal of prejudices. The discovery that the earth revolves around the sun has gradually removed the prejudice that the earth is the center of the universe. The discovery of microbes is gradually removing the prejudice that disease is a punishment from God. The discovery of evolution is gradually removing the prejudice that homo sapiens is a seperate and special creation." Neils Bohr quoted in The Making of the Atomic Bomb by Richard Rhodes
As humans radiated to populate the world, the largest animals went extinct, a part of the continuing damage to the environment.
how Lucy, the mother of humanity, changed our understanding of evolution
Malthus
Bibliography
On Human Nature E.O.Wilson
The Darwinian trap : the hidden evolutionary forces that explain our world (and threaten our future) by Kristian Ronn
Humans, A Monstrous History by Surekha Davies
Our Political Nature, the Evolutionary origins of what divides us by Avi Tuschman
Human: A Brief History of How We F***ed it all up by Tom Phillips