 Universalism is the view that any collection of objects whatsoever has a sum, an object they compose. Thinking just of the present moment, this entails that there is an object composed right now of your left ear, the front fork of your bicycle, and the Louvre. If you think about all times, and imagine that ordinary things are made of instantaneous temporal parts, then you can see that universalist perdurantists believe in quite an extraordinary number of objects. Any combination of temporal parts of any objects from any times, no matter how scattered and disparate, composes an object. So there is an object made of your maternal grandmother’s wedding ring on the day she was married, your right ear yesterday and a brief temporal part of an electron in the year 2525. (Universalism is sometimes called ‘unrestricted mereology’, ‘unrestricted composition’ or ‘unrestricted fusion’; ‘fusion’ means ‘sum’. For more on universalism, see the separate entry on  mereology,  especially section 4.2.)