For the most part history does have a dim view of the mainstream leftist movements (socialists and communists) from the 20th century.
I don't know much about Paine, but trends are pretty clear.
(Right-wing populists have a similarly spotty record, but that just proves my point of a dim view of both sides in this era)
Thomas Paine, an example of a radical leftists in his own time by the standards of his day, is extremely well regarded today despite dying in relative obscurity and relative poverty.
It's the radical right wing that history will take a dim view on. The left can be secure in their control of posterity.