---
title: "Benjamin Franklin"
chunk: 16/18
source: "https://en.wikipedia.org/wiki/Benjamin_Franklin"
category: "reference"
tags: "science, encyclopedia"
date_saved: "2026-05-05T04:06:16.447701+00:00"
instance: "kb-cron"
---

O Pharisaical Britain! to pride thyself in setting free a single Slave that happens to land on thy coasts, while thy Merchants in all thy ports are encouraged by thy laws to continue a commerce whereby so many hundreds of thousands are dragged into a slavery that can scarce be said to end with their lives, since it is entailed on their posterity!
Franklin refused to publicly debate the issue of slavery at the 1787 Constitutional Convention.
At the time of the American founding, there were about half a million slaves in the United States, mostly in the five southernmost states, where they made up 40% of the population. Many of the leading American founders – such as Thomas Jefferson, George Washington, and James Madison – owned slaves, but many others did not. Benjamin Franklin thought that slavery was "an atrocious debasement of human nature" and "a source of serious evils." In 1787, Franklin and Benjamin Rush helped write a new constitution for the Pennsylvania Society for Promoting the Abolition of Slavery, and that same year Franklin became president of the organization. In 1790, Quakers from New York and Pennsylvania presented their petition for abolition to Congress. Their argument against slavery was backed by the Pennsylvania Abolitionist Society.
In his later years, as Congress was forced to deal with the issue of slavery, Franklin wrote several essays that stressed the importance of the abolition of slavery and of the integration of African Americans into American society. These writings included:

"An Address to the Public" (1789)
"A Plan for Improving the Condition of the Free Blacks" (1789)
"Sidi Mehemet Ibrahim on the Slave Trade" (1790)

=== Vegetarianism ===
Franklin became a vegetarian when he was a teenager apprenticing at a print shop, after coming upon a book by the early vegetarian advocate Thomas Tryon. In addition, he would have also been familiar with the moral arguments espoused by prominent vegetarian Quakers in the colonial-era Province of Pennsylvania, including Benjamin Lay and John Woolman. His reasons for vegetarianism were based on health, ethics, and economy:

When about 16 years of age, I happen'd to meet with a book written by one Tryon, recommending a vegetable diet. I determined to go into it ... [By not eating meat] I presently found that I could save half what [my brother] paid me. This was an additional fund for buying books: but I had another advantage in it ... I made the greater progress from that greater clearness of head and quicker apprehension which usually attend temperance in eating and drinking.
Franklin also declared the consumption of fish to be "unprovoked murder." Despite his convictions, he began to eat fish after being tempted by fried cod on a boat sailing from Boston, justifying the eating of animals by observing that the fish's stomach contained other fish. Nonetheless, he recognized the faulty ethics in this argument and would continue to be a vegetarian on and off. He was "excited" by tofu, which he learned of from the writings of a Spanish missionary to Southeast Asia, Domingo Fernández Navarrete. Franklin sent a sample of soybeans to prominent American botanist John Bartram and had previously written to British diplomat and Chinese trade expert James Flint inquiring as to how tofu was made, with their correspondence believed to be the first documented use of the word "tofu" in the English language.
Franklin's "Second Reply to Vindex Patriae," a 1766 letter advocating self-sufficiency and less dependence on England, lists various examples of the bounty of American agricultural products, and does not mention meat. Detailing new American customs, he wrote that, "[t]hey resolved last spring to eat no more lamb; and not a joint of lamb has since been seen on any of their tables ... the sweet little creatures are all alive to this day, with the prettiest fleeces on their backs imaginable."

=== View on inoculation ===
The concept of preventing smallpox by variolation was introduced to colonial America by an African slave named Onesimus via his owner Cotton Mather in the early eighteenth century, but the procedure was not immediately accepted. James Franklin's newspaper carried articles in 1721 that vigorously denounced the concept.
However, by 1736 Benjamin Franklin was known as a supporter of the procedure. Therefore, when four-year-old "Franky" died of smallpox, opponents of the procedure circulated rumors that the child had been inoculated, and that this was the cause of his subsequent death. When Franklin became aware of this gossip, he placed a notice in the Pennsylvania Gazette, stating: "I do hereby sincerely declare, that he was not inoculated, but receiv'd the Distemper in the common Way of Infection ... I intended to have my Child inoculated." The child had a bad case of flux diarrhea, and his parents had waited for him to get well before having him inoculated. Franklin wrote in his Autobiography: "In 1736 I lost one of my sons, a fine boy of four years old, by the small-pox, taken in the common way. I long regretted bitterly, and still regret that I had not given it to him by inoculation. This I mention for the sake of parents who omit that operation, on the supposition that they should never forgive themselves if a child died under it; my example showing that the regret may be the same either way, and that, therefore, the safer should be chosen."

== Views on the future of technology ==
In a letter to Joseph Priestley, dated February 8, 1780, Franklin speculated that in the future "all Diseases may by sure means be prevented or cured, not excepting even that of Old Age, and our Lives lengthened at pleasure even beyond the antediluvian Standard". In the same letter, Franklin wrote: