Thames watermen played an important part in the very early movements that ultimately led to the creation of modern trade unionism in the United Kingdom, most notably in the writings of pamphleteer John Taylor (1580–1653) and later with the use of petitions or "petitions of grievances" in particular the petitions supporting the curtailment of the growth of hackney coaches in the 17th century. As far back as 1644, the House of Commons had specifically exempted them from land service—the use of watermen in land armies—as a direct result of the group pressure exerted by watermen and it is clear that these spectacular early victories redefined the way they negotiated with those in power.