Whitehead was planning a second volume of Treatise on Universal Algebra but both their plans were somewhat disrupted in 1901 when Russell discovered his famous set theory paradox.
Whitehead ay pagpaplano ng isang pangalawang dami ng Treatise sa Universal algebra ngunit pareho ang kanilang mga plano ay tila disrupted sa 1901 kapag Russell natuklasan kanyang tanyag na set theory kabalintunaan.