Answer:
Darwin's struggles and anxiety were shaped by cultural influences stemming from the time period in which he lived. In particular, he was wrestling with the idea of adaptation and the problem of species divergence, which were influenced by the cultural beliefs of his time. For example, Malthus's writings on population growth and limited resources influenced Darwin's thinking on the struggle for survival and the competition for resources among species. Additionally, Darwin's own anxieties and struggles may have been shaped by the broader culture of his time, which placed a high value on individualism, competition, and success. Thus, Darwin's scientific work can be seen as both a reflection of and a response to the cultural influences of his time.