Henri Lefebvre was a French philosopher and sociologist, known for his influential ideas on urban life and social space. He was born in 1901 and became a prominent figure in the fields of Marxism and social theory. Lefebvre's work emphasized the importance of understanding how social relations shape the spaces we inhabit, particularly in urban environments. One of his key contributions is the concept of the "right to the city," which argues that all urban residents should have a say in how their cities are developed and organized. This idea has inspired various movements advocating for social justice and equitable urban planning, influencing contemporary discussions on urban studies and sociology.