I think the point about the age of the earth and evolution might be backwards.
Lord Kelvin had worked out that the earth might be only 20 million years old maybe 60 years earlier based on continually losing heat.
But even at that earlier time biologists and geologists were suggesting that number wasn't high enough to explain what they were seeing in their fields. I think Darwin had suggested a lower bound of at least 300 million based on the erosion he saw locally.
Lord Kelvin had worked out that the earth might be only 20 million years old maybe 60 years earlier based on continually losing heat.
But even at that earlier time biologists and geologists were suggesting that number wasn't high enough to explain what they were seeing in their fields. I think Darwin had suggested a lower bound of at least 300 million based on the erosion he saw locally.