エドゥアルト・ベルンシュタイン
Sá Carneiro tried to adapt the social-democratic ideas of the likes of Eduard Bernstein, Karl Kautsky, and the post-1945 SPD to the cultural context of Portugal and its traditionally Catholic society. The Godesberg Program had a very important influence in his social democratic thought as it became the model for his party and its cut with Marxist socialism.