Leonard George Goodwin CMG FRS[1] (11 July 1915 – 25 November 2008) was a British protozoologist noted for his work on testing the effectiveness of chemical compounds in treating tropical diseases.

[2] He was born in London to a shoe shop manager, and became interested in nature thanks to holidays spent with his grandfather, a gamekeeper, and his uncle, a pharmacist.

He was educated at William Ellis School before being accepted into University College London to study botany and zoology.

He started work at the Wellcome Bureau of Scientific Research but was called up for military service with the Royal Tank Regiment soon afterwards.

[2] The research showed that Pentostam was the least toxic and most effective drug available to treat the disease, and it was issued to troops within a year.