John Boyd Orr was a Scottish teacher, medical doctor, biologist, nutritional physiologist, politician, businessman and farmer. He was the first Director-General of the United Nations Food and Agriculture Organization. In his book titled “As I recall. The 1880’s to the 1960’s”, John Boyd Orr repeatedly described his total commitment to the creation and implementation of a one world government.

As I recall. The 1880’s to the 1960’s by John Boyd Orr:
https://www.fao.org/fileadmin/templates/library/docs/As_I_Recall.pdf

“Since his retirement, Lord Attlee has been devoting his life to promoting world government and world peace, than which there is no more worthy aim for a great politician.” - As I recall. The 1880’s to the 1960’s by John Boyd Orr, Page 152

“6) The co-operation of all nations on a world-wide project of developing the vast potential resources of the earth for the benefit of the wealthy as well as the poor nations would make co-operation easier in political spheres and be an important step to the evolution of the United Nations Organisation as a World Government without which there is little hope of permanent world peace.” - As I recall. The 1880’s to the 1960’s by John Boyd Orr, Page 172

“I had reluctantly agreed to become president of the movement for World Federal Government, due mainly to pressure from Mr. Stringfellow Barr, head of the American movement, and Henry Usborne, a Labour M.P. who devoted all his political activities to promoting world government. I went to the new headquarters of the movement in Paris to see what kind of organisation it had, and found it was in debt, so nearly £2,000 of the prize was devoted to clearing up this deficit and giving it a new start. The rest of the money went in smaller grants to various organisations, but whether or not it did much good it is difficult to say.” - As I recall. The 1880’s to the 1960’s by John Boyd Orr, Page 220