Military theorist Martin van Creveld, has published a piece with the simple title, “Pussycats”: http://www.martin-van-creveld.com/pussycats/. His basic thesis is that high technology has made the modern soldier into a “pussycat,’ someone soft compared to the fighters of yesterday. Technology has taken some of the risk out of fighting, where the hope is to blast one’s enemy at a safe distance with missiles and drones. Armies do not want to take causalities.
Further, Western countries have fought “luxury’ wars rather than existential struggles since the end of World War II, with the threat of nuclear attack, holding enemies at bay, until recently when the enemy was allowed inside the gates. In fact, it is enemy ideologies that now dominate the military of the West, as he says, but not in those words exactly, but better words: