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The psychologist Charles R. Snyder linked hope to the existence of a goal , combined with a determined plan for reaching that goal : Alfred Adler had similarly argued for the centrality of goal-seeking in human psychology , as too had philosophical anthropologists like Ernst Bloch .
 Charles R. Snyder, Alfred Adler, Ernst Bloch
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Charles R. Snyder, Alfred Adler, Ernst Bloch