Become a Member
Judaism

Queen Esther and the flap of a butterfly’s wing

How Purim helps us look for the hidden hand of Providence

February 21, 2013 16:57
The German version: detail from the facsimile of the 1746 Hanover Esther Scroll, which will be launched by Taschen Press at the Jewish Museum in London on February 25

ByRabbi Dr Moshe Freedman, Rabbi Dr Moshe Freedman

3 min read

In the summer of 1666, the English physicist and mathematician Sir Isaac Newton is said to have pondered the falling of an apple while in the gardens of Woolsthorpe Manor, his family home in Lincolnshire. This apocryphal story describes the seminal moment which prompted him to realise that there must be a force acting on the apple which draws it to the centre of the earth.

After publishing his universal law of gravitation together with his three laws of motion in 1687, Newton was able to explain not only the fall of an apple, but also the orbits of the moon and other celestial bodies with incredible accuracy. This discovery heralded a revolution in scientific understanding, which resonated with the beginning of the Enlightenment period. The cosmos was no longer mysterious; epitomised by William Blake’s painting of Newton as the divine geometer, God could be replaced with the rational scientist as master over a measurable, knowable and predictable clockwork universe.

This strengthened the concept of causal determinism, which implies that every physical event has a physical cause or group of causes. In any system, given one set of specific initial conditions, only one physical outcome is possible.

Yet almost 300 years later in 1961, the American mathematician and meteorologist Edward Lorenz was running a computer algorithm designed to model weather systems. Each variable, such as temperature, wind speed and atmospheric pressure, had to be entered manually. After running the model and generating a normal but sophisticated weather system, Lorenz decided to repeat the experiment but rounded one variable of 0.506127 to 0.506.