Who gives the last word about the evolutionary process, genetics or ecology?

In other words, are ecological interactions driven by any genetic phenomenon? Or is it genetics that has been molded by ecology?

[I’m a Brazilian biologist and writer. I write about science – I have just released a new book, O que é darwinismo (What is Darwinism, in Portuguese) – and would like to know the opinion of colleagues from other countries (from any field of scientific knowledge).]

See also What do you think about fitness, adaptation and natural selection? (https://www.researchgate.net/post/What_do_you_think_about_fitness_adaptation_and_natural_selection)

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