Frederick Soddy Quotes
The laws expressing the relations between energy and matter are, however, not solely of importance in pure science. They necessarily come first in order ... in the whole record of human experience, and they control, in the last resort, the rise or fall of political systems, the freedom or bondage of nations, the movements of commerce and industry, the origin of wealth and poverty, and the general physical welfare of the race.
Soddy, Frederick. Matter and Energy. Williams and Norgate, 1912, p. 9.
This very famous quotation says that the total amount of energy in a system always remains the same. It may, change from one form to another like heat to light, but it is always there in one form or another.
This quotation was used in posters and handbills by La Follette and the Progressives to attack Coolidge in the 1924 presidential campaign.
Frederick Soddy FRS was an English radiochemist who explained, with Ernest Rutherford, that radioactivity is due to the transmutation of elements, now known to involve nuclear reactions. He also proved the existence of isotopes of certain radioactive elements. He was a polymath who mastered chemistry, statistical mechanics, finance and economics.