In 1899 Van Deventer wrote a very influential article, called "Een Ereschuld" (a debt of honour) in the Dutch magazine "De Gids".
In this article Van Deventer stated that the Netherlands had a dept of honor of nearly 190 million gulden opposite the Dutch East Indies and had to pay for this dept of honor.
When the Dutch East Indian budget was discussed in the House of Representatives a lot of attention was paid to Van Deventer's article, although not all members agreed with the content of the article.
Van Deventer was appointed member of the editorial board of "The Gids" as of 1 January 1901.
Over the next years until his death he would write numerous articles in this magazine.
In June 1901 Van Deventer accepted his candidacy for the electoral association Schiedam (for the Free-thinking Democratic League), located the Schiedam, for the elections for the House of Representatives, but was not chosen.
In lectures Van Deventer showed himself a supporter for the installation of a Dutch East Indian House of Representatives in the Dutch East Indies.
In June 1902 he was appointed member of the "Algemeen Nederlands Verbond" (General Dutch Covenant) and wrote in het "Tijdschrift voor Nederlands-Indië" (Magazine for the Dutch East Indies) together with others, a concept colonial program; in this program the authors stated that the administrative power should lie more with the residents of the Dutch East Indies and that the government of the Netherlands should limit its interference to general government principles only.
It seems contradictory that he also signed the telegram, send to general J. B. van Heutsz, in which he was complemented with the submission of Panglima Polim (a local leader), which was achieved by military force, in Aceh.

Van Deventer became a member of the board of the Royal Netherlands Institute of Southeast Asian and Caribbean Studies (1903) and that same year attended the meeting in London of the "Institut Colonial International".
In September 1904 he was appointed knight in the Order of the Netherlands Lion.
He kept writing articles in different magazines, other than The Gids; for instance he published a series of four articles in the Soerabaijasch Handelsblad in December 1904, called "Over de suikercultuur- en suikerindustrie" (about the sugar industry).
On 19 September 1905 Van Deventer was elected as a Free-thinking Democratic member of the House of Representatives for the constituency Amsterdam IX and as such he emphasized his three focus points regarding Dutch East Indian policy: education, irrigation and emigration.
He was also a promoter of the so-called Dutch Ethical Policy but at the same time said in a speech given in the House of Representatives on 16 November 1905, that if persuasion did not work it would be inevitable to use military force.
In a series of articles in the "Soerabajasch Handelsblad" in August 1908 called "Insulinde's toekomst" (the future of the Dutch East Indies) he wrote about the importance of eductation and the creation of new jobs for natives on higher management levels.
Van Deventer was not reelected and left the House of Representatives on 21 September 1909.
In 1899 Van Deventer wrote a very influential article, called "Een Ereschuld" (a debt of honour) in the Dutch magazine "De Gids". In this article Van Deventer stated that the Netherlands had a dept of honor of nearly 190 million gulden opposite the Dutch East Indies and had to pay for this dept of honor. When the Dutch East Indian budget was discussed in the House of Representatives a lot of attention was paid to Van Deventer's article, although not all members agreed with the content of the article. Van Deventer was appointed member of the editorial board of "The Gids" as of 1 January 1901. Over the next years until his death he would write numerous articles in this magazine. In June 1901 Van Deventer accepted his candidacy for the electoral association Schiedam (for the Free-thinking Democratic League), located the Schiedam, for the elections for the House of Representatives, but was not chosen. In lectures Van Deventer showed himself a supporter for the installation of a Dutch East Indian House of Representatives in the Dutch East Indies. In June 1902 he was appointed member of the "Algemeen Nederlands Verbond" (General Dutch Covenant) and wrote in het "Tijdschrift voor Nederlands-Indië" (Magazine for the Dutch East Indies) together with others, a concept colonial program; in this program the authors stated that the administrative power should lie more with the residents of the Dutch East Indies and that the government of the Netherlands should limit its interference to general government principles only. It seems contradictory that he also signed the telegram, send to general J. B. van Heutsz, in which he was complemented with the submission of Panglima Polim (a local leader), which was achieved by military force, in Aceh.
Van Deventer became a member of the board of the Royal Netherlands Institute of Southeast Asian and Caribbean Studies (1903) and that same year attended the meeting in London of the "Institut Colonial International". In September 1904 he was appointed knight in the Order of the Netherlands Lion. He kept writing articles in different magazines, other than The Gids; for instance he published a series of four articles in the Soerabaijasch Handelsblad in December 1904, called "Over de suikercultuur- en suikerindustrie" (about the sugar industry). On 19 September 1905 Van Deventer was elected as a Free-thinking Democratic member of the House of Representatives for the constituency Amsterdam IX and as such he emphasized his three focus points regarding Dutch East Indian policy: education, irrigation and emigration. He was also a promoter of the so-called Dutch Ethical Policy but at the same time said in a speech given in the House of Representatives on 16 November 1905, that if persuasion did not work it would be inevitable to use military force. In a series of articles in the "Soerabajasch Handelsblad" in August 1908 called "Insulinde's toekomst" (the future of the Dutch East Indies) he wrote about the importance of eductation and the creation of new jobs for natives on higher management levels. Van Deventer was not reelected and left the House of Representatives on 21 September 1909.
Conrad Theodor van Deventer