Finishing line:
Gillian: To put it mildly. Since the dawn of time, men have harvested whales for a variety of purposes, most of which can be achieved synthetically at this point. One hundred years ago, using hand-thrown harpoons, they did plenty of damage -- but that was nothing compared to what they've achieved in this century. This is mankind's legacy: whales hunted to the brink of extinction. Virtually gone is the Blue Whale, the largest creature ever to inhabit the Earth. Despite all attempts at banning whaling, there are still countries and pirates currently engaged in the slaughter of these inoffensive creatures. Where the humpback whale once numbered in the hundreds of thousands, today there are less than ten thousand specimens alive and those that are taken are no longer fully grown. In addition, many of the females are killed, while still bearing unborn calves.
And my line:
Spock: To hunt a species to extinction is not logical.