This document discusses the history of urban planning from the late 19th century to modern times. It mentions several influential urban planners and their projects, such as Howard and his 1898 plan for Adelaide, Australia. Le Corbusier designed the 1925 Plan Voisin for Paris. Brasilia was built in the late 1950s. The document contrasts the top-down modernist urban planning approaches of figures like Robert Moses with the grassroots perspective advocated by Jane Jacobs in the 1970s. It quotes Henri Lefebvre's view that the right to the city involves both individual liberty and collective power to reshape urbanization. Different eras from the 1950s to 1990s are characterized in terms of concepts like purity, lifestyle, entrepreneurialism,