Complex sentence: It is only since the second half of the twentieth century that scientists try to evaluate the story of Michael Gaismair from a non-ideologic viewpoint, especially promoted by the the Michael Gaismair Gesellschaft (Society Michael Gaismair), founded in 1976.
Split into simpler sentences: It is only since the second half of the twentieth century that seeks to evaluate the story of Michael Gaismair on a non ideologizzanti. In this work stands out the Michael Gaismair Gesellschaft (Society Michael Gaismair), founded in 1976.