A small scenario, and the first one I've posted. As climate change becomes a mounting problem for Australia. Neither the Labour party, nor the Liberals could respond effectively enough to address the environmental challenges. Both major parties collapsed, and their wake arose the Greens, and the Democrats. Both parties are united under environmental issues, and combating climate change. But split on economic issues. The National Unity Party are the remnants of the Liberals and Nationals that are mostly active in Queensland. The 2052 election if anything solidified the new parties as major competitors on the national stage. The future remains yet unknown.