Works in ChatGPT, Claude, or Any AI
Add semantic quote search to your AI assistant via MCP. One command setup.
" "[T]he claim that the central concern of religion is nonsense. Throughout human history, the central concern of religion has been human self-interest. In the Judeo-Christian-Islamic tradition, all morality has been obtained from declarative sentences of the form "Thou shalt not kill—because you'll go to Hell if you do!" In the Hindu-Buddhist tradition... "...—because you'll be born as a cockroach if you do!" ...In both cases, the appeal is to physics, not to fundamental moral postulates.
(born February 1, 1947) is an American mathematical physicist and cosmologist, holding a joint appointment in the Departments of Mathematics and Physics at Tulane University. Tipler has written books and papers on the based on Pierre Teilhard de Chardin's religious ideas, which he claims is a mechanism for the resurrection of the dead. He is also known for his theories on the (Tipler time machine) and for the , an argument that no intelligent life exists outside of the Solar System. His work has attracted criticism, notably from systems theorist George F. R. Ellis who has argued that his theories are largely pseudoscience.
Add semantic quote search to your AI assistant via MCP. One command setup.
Related quotes. More quotes will automatically load as you scroll down, or you can use the load more buttons.
Once the exploration and/or colonization of the Galaxy has begun, it can be modeled... by the mathematical theory of island colonization... developed... by MacArthur & Wilson... since... islands... are closely analogous to stars in the heaven, and von Neumann machines are even more closely analogous to biological species.
Enjoy ad-free browsing, unlimited collections, and advanced search features with Premium.
The factors <math>f_lf_if_c</math> should not depend strongly on the evolution of the Galaxy... and so can be regarded as constants. Since the Galaxy is between 11 and 18 billion years old, the number N of stars older than 5.3 billion years is about twice the number of stars formed after the Sun, and thus approximately equal to the number of stars in the Galaxy, 10<sup>11</sup>. Thus <math>p \leqslant 10^{-11}</math>. If we accept the usual values of <math>f_p=0.1</math> to 1 and <math>n_e = 1</math> found in most discussions... then <math>f_lf_if_c \leqslant 10^{-10}</math>. The number of communicating civilizations now existing in our Galaxy is less than or equal to <math>p</math> x (number of stars in galaxy) = 1; that is to say, us.