2. Contact with the Maguindanao sultanate,3. Extensive exposure and Intermarriages of Kalagan and Masuind Tausug.
The Kaagans are mostly found in Dava Sirawan, around Tagum, Davao del Norte, Mati Davao Oriental some places in Davao del Sur, and the other two Davao provinces. As of 1981, there are 6000 Kaagans in the country.
Kaagan language has many bahasa sug root words because of the arrival of the Tausugs who helped them organize their tribal society.
The Kalagans use Tagakaolo language, Maguindanaon words are increasingly used.
They are classified as: Austronesian, Malayo-Polynesian, Western Malayo-Polynesian, Meso Philippine, Central Philippine, Mansakan, Western.
They have 82% intelligibility of Piso dialect, bilingualism in Cebuano, strong ethnic identity, preference for Kalagan language over Cebuano. Literacy rate in second language is perhaps 60%.
With the departure of the Tausug and Maguindanao influences at the height of the Filipinization process. Most of them have been marginalized and were helpless to improve their society because their social organization did not improve as those in Lanao and Sulu.
They are agriculturists, cultivating rice, coconut for crashed crops, while those living along the coast engage in fishing.