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Description
Proof!: How the World Became GeometricalAn eye opening narrative of how geometric principles fundamentally shaped our world On a cloudy day in 1413, a balding young man stood at the entrance to the Cathedral of Florence, facing the ancient Baptistery across the piazza. As puzzled passers by looked on, he raised a small painting to his face, then held a mirror in front of the painting. Few at the time understood what he was up to; even he barely had an inkling of what was at stake. But on
An eye-opening narrative of how geometric principles fundamentally shaped our world
On a cloudy day in 1413, a balding young man stood at the entrance to the Cathedral of Florence, facing the ancient Baptistery across the piazza. As puzzled passers-by looked on, he raised a small painting to his face, then held a mirror in front of the painting. Few at the time understood what he was up to; even he barely had an inkling of what was at stake. But on that day, the master craftsman and engineer Filippo Brunelleschi would prove that the world and everything within it was governed by the ancient science of geometry. In Proof , the award-winning historian Amir Alexander traces the path of the geometrical vision of the world as it coursed its way from the Renaissance to the present, shaping our societies, our politics, and our ideals. Geometry came to stand for a fixed and unchallengeable universal order, and kings, empire-builders, and even republican revolutionaries would rush to cast their rule as the apex of the geometrical universe. For who could doubt the right of a ruler or the legitimacy of a government that drew its power from the immutable principles of Euclidean geometry? From the elegant terraces of Versailles to the broad avenues of Washington, DC and on to the boulevards of New Delhi and Manila, the geometrical vision was carved into the landscape of modernity. Euclid, Alexander shows, made the world as we know it possible.Binding Type: Hardcover
Publisher: Scientific American
Published: 09/10/2019
ISBN: 9780374254902
Pages: 320
Weight: 1.25lbs
Size: 9.10h x 6.10w x 1.20d
Review Citations: Publishers Weekly 05/27/2019 pg. 78
Kirkus Reviews 07/15/2019
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4.6 ★★★★★
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Product Reviews
★★★★★ 5
Great daily lotion
Style: 3.38 Fl Oz (Non SPF)
Great daily lotion. I love that it is light and fragrance free. It is perfect for day use. I have dry skin and sometimes it is not enough to use by itself. I mostly use it during the day as a base for sunscreen but it feels really good on the face and does not leave my face feeling greasy. The ingredients are really good and the value for money is great. I love LRP products and this is so easy to use.
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Reviewed in the United States on April 17, 2026
★★★★★ 5
✨ My New Favorite Face Cream for Hydrated & Glowing Skin ✨
Style: 3.38 Fl Oz (Non SPF)
“I’ve been using this La Roche-Posay cream for a few days now and I absolutely love it 😍💧 My skin feels super hydrated, soft, and has a healthy glow without any greasy residue. Plus, it’s perfect for sensitive skin because it feels light and soothing. My face feels so much fresher and more cared for ✨ I would definitely buy it again
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Reviewed in the United States on May 27, 2026
★★★★★ 5
The best
Style: 3.38 Fl Oz (Non SPF)
I’ve been using the La Roche-Posay Toleriane Double Repair Face Moisturizer for a few weeks now, and it’s honestly one of the best daily moisturizers I’ve tried—especially for sensitive skin.
First thing I noticed is how lightweight it feels. It absorbs quickly and doesn’t leave that greasy or heavy film that a lot of “hydrating” lotions do. My skin feels instantly softer, but not suffocated. It layers really well under makeup too—no pilling or weird texture.
What really stands out is how balanced my skin has been since using it. I tend to get dry patches but also occasional breakouts, and this somehow helps with both. It hydrates without clogging pores, and I’ve noticed less redness overall. The fact that it contains ceramides and niacinamide is a huge plus if you’re trying to repair your skin barrier.
It’s also fragrance-free, which I personally look for because anything scented tends to irritate my skin.
The only small downside is the price point compared to drugstore moisturizers, but honestly, a little goes a long way and the quality makes it worth it.
Overall, I’d definitely recommend this if you have sensitive, combination, or dry skin and want something simple but effective. It’s become a staple in my routine.
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Reviewed in the United States on April 20, 2026
★★★★★ 4
Moisturizing & repairs skin barrier, but does pill.
Style: 3.38 Fl Oz (Non SPF)
Given myself a couple weeks of consistent use before giving a review. There are a lot of pros to this product which include: moisturizing and stays moisturized all day, made my PIE marks (post acne marks) fade a lot faster. Repairs my skin barrier, especially while using tretinoin nightly, not too thick but thick enough to keep my face hydrated. It does not have a smell.
The cons are: slight burn for about 15 seconds but disappears, it pills if I apply too much. It does pill less if I pat it on my face versus rubbing; it does not pill when I apply liquid foundation. I just have to let it dry for 15-20 mins before applying makeup.
I found the pros to overpower the cons and will continue to use this product.
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Reviewed in the United States on May 15, 2026
★★★★★ 5
Will buy again!
Style: 3.38 Fl Oz (Non SPF)
This is a very nice product. For the size it seems a bit expensive, but a little goes a long way and it may be a better value than I initially thought. My skin does look better, so it is doing it's job! I like the texture of it. It is fairly light, not oily, absorbs quickly into the skin, which I like. Highly recommend.
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Reviewed in the United States on April 21, 2026