You're right @lemouth. As you can see, in the past, without any form of technological advancement, human activities has cause more than a thousand species to be obliterated. Now, with some help from conservation effort and laws which forbid certain activities to be carried out, the situation seems to get a little bit better but who knows how many species that we have cause to extinct up until now. Some illegal activities still prevalent and certain other factors which is also influenced by human's activity such as global warming and extreme climate changes has made this world an unsuitable habitat for certain species which cause them to go extinct. It's an indirect cause of extinction.