Well put. However you leave out mention of Dostoevsky (Christian Existentialism) and Turgenev (Nihilistic Existentialism). Maybe because they were fictional writers but their crisis in 19th century Russia was real and what led to Bolshevism. Sarte was my introduction to existentialism but I have found more solace in Dostoevsky's unique perspective. Thank you for putting it the way you do. Look forward to reading more.