Complex sentence: Many of the songs Donovan wrote for "Neutronica" are directly related to his campaigning against what he viewed as disproportionate spending on weapons while famine existed across much of the world.
Split into simpler sentences: Many of the songs Donovan wrote for "Neutronica" are directly related to his political views. At the time, he was campaigning against what he viewed as disproportionate military spending while famine existed across much of the world.