(or in some cases the trustees of their bankrupt estates) no longer tried to retain their tenants on their land, either encouraging or assisting emigration, or, in the more desperate circumstances, virtually compelling those in substantial rent arrears to accept an assisted passage (i.e., to emigrate), with the alternative of simple eviction. The potato famine followed shortly after the collapse of the kelp industry. Faced with a severe famine, the government made clear to any reluctant landlords that they had the primary responsibility of feeding their destitute tenants, whether through employment in public works or estate improvement, or simply by the provision of famine relief. The threat of full application, and possible reform, of the Poor Laws (that would have had the effect of formalising the obligation to feed all the destitute in each parish) was the final impetus to the various assisted emigration measures. In the decades following 1815, the ideological and political consensus changed. Surplus population slowly became thought of as a liability; their need to be fed could not be ignored in a philanthropic age. Therefore, large-scale expatriation was considered as a solution to the social crisis in the Highlands. The ideas of Malthus were adopted by many in a position to influence policy. The Passenger Vessels Act was repealed in 1827 and in 1841 a select committee of the House of Commons concluded that the crofting parishes had a surplus population of 45,000 to 60,000. Discrimination The primary motivation for clearance was economic. Associated with this was the suggestion by some theorists that the Celtic population were less hardworking than those of Anglo-Saxon stock (i.e. Lowlanders and, in some instances, English), so giving an economic element to a racial theory. James Hunter quotes a contemporary Lowland newspaper: ‘Ethnologically the Celtic race is an inferior one and, attempt to disguise it as we may, there is ... no getting rid of the great cosmical fact that it is destined to give way ... before the higher capabilities of the Anglo-Saxon.' These views were held by people like Patrick Sellar, the factor employed by the Countess of Sutherland to put her plans into effect, who often wrote of his support for these ideas, and Sir Charles Trevelyan, the senior government representative in organising famine relief during the Highland Potato Famine. (Trevelyan regarded himself as a "reformed Celt", having a Cornish Celtic heritage.) There is little doubt that racism