List any three drawbacks of Darwinism

Explanation

**Step-by-Step Solution:**

1. **Drawback 1: Lack of Understanding of the Origin of Variation**
- Darwin's theory does not explain how variations arise within species. He observed variations, such as those in Darwin's finches, but did not understand their origin. The concept of mutation, which explains the source of these variations, was not known during his time. This limitation means that Darwinism lacks a genetic basis for the variations observed in populations.

2. **Drawback 2: Inability to Explain the Origin of New Characters**
- Darwin's theory does not adequately address how new traits or characters emerge in species. While he recognized adaptations, he did not provide a mechanism for how these modifications occur. The process of how existing traits can dissolve or how new traits can develop remains unexplained in his framework.

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