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Big Hypotheses · 8

Contemporary · Big Hypotheses

Are You Living in a Computer Simulation?

Bostrom's argument doesn't claim we are in a simulation — it's a trilemma. If any future civilization eventually gains enough computing power to simulate entire conscious populations of their ancestors, and nothing stops them from wanting to, the number of simulated minds would vastly outnumber the one original population by many orders of magnitude. So if you accept that such simulations are possible and that at least some civilizations would choose to run many of them, simple probability suggests an average observer picked at random is far more likely to be one of the many simulated minds than the one original.

Nick Bostrom · 2003 swipe · next · J/K

Contemporary · Big Hypotheses

The Great Filter — Are We Almost Past It?

This essay is Hanson's contribution to the Fermi paradox: if the universe is so old and vast, where is everybody? His framing: think of the path from dead matter to a civilization expanding across the galaxy as a sequence of hard steps — the origin of life, the jump to complex cells, the emergence of intelligence, the emergence of technological civilization, civilization surviving its own technology, among others. Since we observe zero visible galaxy-spanning civilizations anywhere, at least one of these steps must be extraordinarily improbable, a filter that almost nothing gets through.

Robin Hanson · 1998

Contemporary · Big Hypotheses

Determined: A Science of Life Without Free Will

Sapolsky, a neuroscientist, builds his case biologically rather than purely philosophically: he walks through the causal chain behind any single behavior, from what happened in your brain one second before the action, to hormones and sensory context in the preceding hours, to childhood and adolescent development in preceding years, to genes and prenatal environment before you were even born. His claim is that at no point in that chain is there a gap where an uncaused 'you,' separate from all these prior causes, steps in and freely decides; every link is explicable by what came before it.

Robert Sapolsky · 2023

Contemporary · Big Hypotheses

Galileo's Error

Goff's title refers to a specific historical decision: Galileo, in founding modern physics, split the world into quantitative properties — mass, motion, shape, measurable and mathematizable, the proper domain of science — and qualitative properties — color as experienced, taste, pain, treated as a separate, non-physical realm. Goff argues this founding split is why physical science, no matter how advanced, will never on its own terms explain subjective experience — it was designed from the start to describe everything except that.

Philip Goff · 2019

Canonical · Big Hypotheses

Large Number Coincidences and the Anthropic Principle in Cosmology

Carter's paper, presented in 1973 and published in 1974, formalized an observation physicists had noticed informally: numbers like the strength of gravity relative to electromagnetism, or the precise ratios governing stellar formation, sit in an extremely narrow range — if they were even slightly different, stars, chemistry, or stable planets, and therefore anyone around to measure them, likely couldn't exist. Carter's key move was pointing out a subtle selection effect: we should expect to find ourselves in a universe compatible with our own existence, no matter how statistically rare such a universe is among all possible ones, simply because we couldn't be observing it otherwise.

Brandon Carter · 1974

Contemporary · Big Hypotheses

Our Mathematical Universe

Tegmark's starting observation is that physics has always used mathematics to describe reality, but usually treats the math and the reality it describes as two different things — the map versus the territory. His hypothesis collapses that distinction: if a theory of everything is ever found and it's purely mathematical with no ad hoc extra ingredients, that suggests reality just is that mathematical structure, not merely modeled by it — dissolving the older puzzle about the 'unreasonable effectiveness' of mathematics in physics by making it not a mystery at all: math works because reality is math.

Max Tegmark · 2014

Canonical · Big Hypotheses

The Kardashev Scale

If we find alien life, how will we know how advanced they are? Russian astrophysicist Nikolai Kardashev proposed a simple scale based on energy consumption: Type I (Planetary), Type II (Stellar), and Type III (Galactic).

Nikolai Kardashev · 1964

Contemporary · Big Hypotheses

Dark Forest Theory

The Fermi Paradox asks: if the universe is so vast and old, where are all the aliens? The Dark Forest Theory provides a terrifying answer: they are out there, but they are staying perfectly quiet to survive.

Liu Cixin · 2008