Anti-environmentalism is a backlash against the environmentalist movement. Anti-environmentalists believe that earth is not as fragile as environmentalists maintain, citing its 5 billion year existence versus the 50 year environmentalist viewpoint. Some also believe that environmentalism is born of mankind's exaggerated sense of importance, that environmentalism is an extremist religion due accordant scrutiny, and/or that some environmentalist factions use pseudo-science and scare tactics in an attempt to force their philosophical/religious values and political agenda on others.