"Trevor Underwood was born in England in 1943, and became a US citizen in 2004. He earned a M.A. in mathematics and physics at Cambridge University, in 1965, and a M.Sc. in economics at the London School of Economics in 1967, followed by further graduate studies in international economics at the University of Rochester, NY, and at Harvard University, between 1967 and 1969. He worked for the Bank of England, the International Monetary Fund, and the UK Treasury and was a UK Advisor to the Committee of Twenty on Reform of the International Monetary System, between 1969 and 1973. He founded a treasury consultancy business in 1974 and a treasury software company in 1976, which he continued to run until 2017. In 2008 he returned to scientific research, initially on human evolution. In November 2015, he published a paper ""A new model of human dispersal"" on bioRxiv.org, the online preprint archive for biology run by Cold Spring Harbor Laboratory. Between December 2015 and November 2019, he worked on climate science, during which time he wrote six climate science papers. In November 2019, these were published in a book ""The Surface Temperature of the Earth"", distributed by Lulu.com. He then returned to theoretical physics to review progress since he left Cambridge in 1965, in particular on electromagnetic radiation, matter and gravity. In December 2021, he published a spin-off from this research, ""Urbain Le Verrier on the Movement of Mercury - annotated translations"", distributed by Lulu.com. In April 2023, he published ""Quantum Electrodynamics - annotated sources. Volumes I and II""; in June 2023, ""Special Relativity""; in November 2023, ""General Relativity"", and in March 2024, ""Gravity"", also distributed by Lulu.com."