Final answer:
Wittgenstein's motivations for living in the USSR are debated, with suggested influences ranging from Spengler's philosophy to a disdain for bourgeois lifestyle. His deep religious contemplations and the complex Russian intellectual and political climate may have also shaped his decision.
Step-by-step explanation:
The motivations behind Ludwig Wittgenstein's decision to live in the USSR are complex and subject to varied interpretations. While theories suggest influences like Oswald Spengler's views, rejection of bourgeois comforts, or even a connection with the Cambridge 5 spy network, these explanations remain contested and not wholly convincing.
Wittgenstein's profound interest in religious thought despite his non-practicing Catholic status, along with his contemplative nature that led him to seek a spartan lifestyle, may have influenced his move. Additionally, the intellectual climate in Russia which often equated intellectuals to criminals, the immense historical changes during the revolutionary period, and the impactful figures like Lenin and Stalin who defied simple characterization, may have provided a fertile intellectual environment for Wittgenstein's enigmatic personality.