What is the theme in One Man's Meat by E. B. White?

Undercurrents of war is a major theme. White and his family move to Maine in the summer of 1938, and by autumn of that year his columns begin to speak of the unrest and increasing activities of Adolf Hitler and his attempts to gain control over European countries. At first White notes the world events quietly but as time goes on he becomes more vocal in his opinions about the despotic behavior that is terrorizing Europeans.