 Complete the following phrase:  The relationship between ethnic Greek identity and Greek Orthodox religion continued after the creation of the modern Greek nation-state in 1830. According to the second article of the first Greek constitution of 1822, a Greek was defined as any native Christian resident of the Kingdom of Greece, a clause removed by 1840. A century later, when the Treaty of Lausanne was signed between Greece and Turkey in 1923, the two countries agreed to use religion as the determit for ethnic identity for the purposes of population exchange, although most of the Greeks displaced over a million of the total 1.5 million had already been driven out by the time the agreement was signed. The Greek genocide, in particular the harsh removal of Pontian Greeks from the southern shore area of the Black Sea, contemporaneous with and following the failed Greek 