"Enlightenment is always a crime."

I highly recommend this fascinating history of a time in American history when the Government allowed medical research into LSD.  Two samples to whet your appetite.  First, the opening:

At 9:30 in the morning, an architect and three senior scientists—two from Stanford, the other from Hewlett-Packard—donned eyeshades and earphones, sank into comfy couches, and waited for their government-approved dose of LSD to kick in. From across the suite and with no small amount of anticipation, Dr. James Fadiman spun the knobs of an impeccable sound system and unleashed Beethoven’s “Symphony No. 6 in F Major, Op. 68.” Then he stood by, ready to ease any concerns or discomfort.

For this particular experiment, the couched volunteers had each brought along three highly technical problems from their respective fields that they’d been unable to solve for at least several months. In approximately two hours, when the LSD became fully active, they were going to remove the eyeshades and earphones, and attempt to find some solutions. Fadiman and his team would monitor their efforts, insights, and output to determine if a relatively low dose of acid—100 micrograms to be exact—enhanced their creativity.

It was the summer of ’66. And the morning was beginning like many others at the International Foundation for Advanced Study, an inconspicuously named, privately funded facility dedicated to psychedelic drug research, which was located, even less conspicuously, on the second floor of a shopping plaza in Menlo Park, Calif. However, this particular morning wasn’t going to go like so many others had during the preceding five years, when researchers at IFAS (pronounced “if-as”) had legally dispensed LSD. Though Fadiman can’t recall the exact date, this was the day, for him at least, that the music died. Or, perhaps more accurately for all parties involved in his creativity study, it was the day before.

Then this, from a few graphs further down:

Over the course of the preceding year, IFAS researchers had dosed a total of 22 other men for the creativity study, including a theoretical mathematician, an electronics engineer, a furniture designer, and a commercial artist. By including only those whose jobs involved the hard sciences (the lack of a single female participant says much about mid-century career options for women), they sought to examine the effects of LSD on both visionary and analytical thinking. Such a group offered an additional bonus: Anything they produced during the study would be subsequently scrutinized by departmental chairs, zoning boards, review panels, corporate clients, and the like, thus providing a real-world, unbiased yardstick for their results.

In surveys administered shortly after their LSD-enhanced creativity sessions, the study volunteers, some of the best and brightest in their fields, sounded like tripped-out neopagans at a backwoods gathering. Their minds, they said, had blossomed and contracted with the universe. They’d beheld irregular but clean geometrical patterns glistening into infinity, felt a rightness before solutions manifested, and even shapeshifted into relevant formulas, concepts, and raw materials.

But here’s the clincher. After their 5HT2A neural receptors simmered down, they remained firm: LSD absolutely had helped them solve their complex, seemingly intractable problems. And the establishment agreed. The 26 men unleashed a slew of widely embraced innovations shortly after their LSD experiences, including a mathematical theorem for NOR gate circuits, a conceptual model of a photon, a linear electron accelerator beam-steering device, a new design for the vibratory microtome, a technical improvement of the magnetic tape recorder, blueprints for a private residency and an arts-and-crafts shopping plaza, and a space probe experiment designed to measure solar properties. Fadiman and his colleagues published these jaw-dropping results and closed shop.