On 24 March 2012, at the 40th anniversary of the establishment of the Tasmanian Greens, Brown warned about degradation of the Earth and the impact that could have on future generations. He postulated that other civilisations in the universe are: not communicating with Earth. They have extincted themselves. They have come and gone. And now it's our turn. As a possible approach to pre-empting this he proposed a Global Parliament. He was met with a standing ovation. The then deputy leader Christine Milne said it was "a very inspiring speech". There was criticism of his approach. At the Global Greens Conference in Dakar, Senegal Africa, 1 April 2012, Bob Brown advocated that there be established a "global parliament" where "every citizen should have an equal say". The final resolution supported by the Australian Greens and others, was passed.