George Edward "G. E." Moore OM, FBA was philosopher, one of the founders of the analytic tradition along with Bertrand Russell, Ludwig Wittgenstein, and (before them) Gottlob Frege. With Russell, he led the turn away from idealism in British philosophy, and became well known for his advocacy of common sense concepts, his contributions to ethics, epistemology, and metaphysics, and "his exceptional personality and moral character." He was Professor of Philosophy at the University of Cambridge, highly influential among (though not a member of) the Bloomsbury Group, and the editor of the influential journal Mind. He was elected a fellow of the British Academy in 1918. He was a member of the Cambridge Apostles, the intellectual secret society, from 1894, and the Cambridge University Moral Sciences Club.
This book is great if you want to get an overview of the central ideas of philosophy. However, this text is not made to be understood. One example of such unreadable text
"Obviously the things, whose present existence i should, on this hypothesis, be able to infer would be things of the same sort as those with regard to which i have what i called the accepted theory-they would be sense-data--they would be sense-data more or less resembling those which i should see or feel, if i saw or felt a skeleton."
This is a 60 words sentence which I could not understand after 20 minutes reading and rereading. I had to give up on reading this book.