Tynged yr Iaith
In 1962 Saunders Lewis gave a radio talk entitled Tynged yr Iaith (The fate of the language) in which he predicted the extinction of the Welsh language unless action was taken. This led to the formation of Cymdeithas yr Iaith Gymraeg (the Welsh Language Society) the same year. Nationalism grew particularly following the flooding of the Tryweryn valley in 1965, drowning the village of Capel Celyn to create a reservoir supplying water to Liverpool. In 1966 Gwynfor Evans won the Carmarthen seat for Plaid Cymru at a by-election, their first Parliamentary seat.