Dr Ernst Mayr has been one of the seminal figures of 20th century biol
ogy. His essential contributions were in the development of the Modern
Synthesis in evolutionary biology. His landmark book Systematics and
the Origin of Species, was published in 1942 and has long been acknowl
edged as one of the key foundations of 20th century evolutionary biolo
gy. In many subsequent articles and books on evolution and the history
and philosophy of biology during the past half century, he has contin
ued to be a key contributor of ideas and inspiration to successive gen
erations of evolutionary biologists. In the first of two 'Roots' artic
les, he describes the early stages of his career and the serendipitous
events that furthered it. This article was first presented as a talk,
on October 27, 1993, at the 50 year Jubilee celebration of the foundi
ng of the Whitney wing, the ornithological section, of the American Mu
seum of Natural History in New York City. In next month's 'Roots' arti
cle, Dr Mayr will describe the events that led to the founding of the
Society for the Study of Evolution in 1946, in St Louis, Missouri.