Darwin saw natural selection as an overarching explanatory hypothesis that gave a causal explanation of evolutionary change, was consistent with the experience of plant and animal breeders, and made sense of a host of facts, such as he had uncovered in his research on barnacles, orchids, climbing plants, and many others. The evidence for natural selection, he asserts in a letter is “(i) On its being a vera causa, from the struggle for existence; and the certain geological fact that species do somehow change.
Darwin saw natural selection as an overarching explanatory hypothesis that gave a causal explanation of evolutionary change, was consistent with the experience of plant and animal breeders, and made sense of a host of facts, such as he had uncovered in his research on barnacles, orchids, climbing plants, and many more things.
In conclusion, life in the towns and cities of the Industrial Revolution was difficult for working-class people. They were often forced to live in cramped conditions that lacked basic sanitation and running water.