(i) The similarity of the graffiti found on the megalithic burial pots of South India with the Indus script and the identical place names of Tamil Nadu and Indus region of Pakistan are presented as arguments to establish the relationship between the Indus civilisation and Tamil culture.
(ii) Researchers like Father Henry Heras, Asko Parpola and Iravatham Mahadevan find similarity between the Indus script and the Dravidian/Tamil language.
(iii) Archaeological evidence points out that several groups of people have been living in Tamil Nadu and South India continuously from the Mesolithic period.
(iv) A few groups from the Indus region might have migrated into southern India.
(v) Some of the ideas and technologies of the Indus civilisations had reached South India in the Iron Age.
(vi) The camelian beads, shell bangles and bronze mirrors found in the Megalithic/Early Historic sites of Tami Nadu were first introduced by the people of the Indus civilisation. More research is needed to arrive at any definite conclusion in this matter.
(vii) The towns of ancient Tamilagam such as Arikkamedu, Uraiyur and Keezhadi that flourished are part of the second urbanisation of India and these towns are much different from the Indus cities. These towns emerged approximately 1,200 years after the decline of the Indus civilisation.
