This is a proceeding against the governor of the state of Oklahoma and other officials who constitute the state banking board, to prevent them from levying and collecting an assessment from the plaintiff under an act approved December 17, 1907. This act creates the board, and directs it to levy upon every bank existing under the laws of the state an assessment of 1 per cent of the bank's average daily deposits, with certain deductions, for the purpose of creating a depositors' guaranty fund. There are provisos for keeping up the fund, and by an act passed March 11, 1909, since the suit was begun, the assessment is to be 5 per cent. The purpose of the fund is shown by its name. It is to secure the full repayment of deposits. When a bank becomes insolvent and goes into the hands of the bank commissioner, if its cash immediately available is not enough to pay depositors in full, the banking board is to draw from the depositors' guaranty fund (and from additional assessments if required) the amount needed to make up the deficiency. A lien is reserved upon the assets of the failing bank to make good the sum thus taken from the fund. The plaintiff says that it is solvent and does not want the help of the guaranty fund, and that it cannot be called upon to contribute toward securing or paying the depositors in other banks, consistently with article 1, § 10, and the 14th Amendment of the Constitution of the United States. The petition was dismissed on demurrer by the supreme court of the state. 22 Okla. 48, 97 Pac. 590.

The reference to article 1, § 10, does not strengthen the plaintiff's bill. The only contract that it relies upon is its charter. That is subject to alteration or repeal, as usual, so that the obligation hardly could be said to be impaired by the act of 1907 before us, unless that statute deprives the plaintiff of liberty or property without due process of law. See Sherman v. Smith, 1 Black, 587, 17 L. ed. 163. Whether it does so or not is the only question in the case.

In answering that question, we must be cautious about pressing the broad words of the 14th Amendment to a drily logical extreme. Many laws which it would be vain to ask the court to overthrow could be shown, easily enough, to transgress a scholastic interpretation of one or another of the great guaranties in the Bill of Rights. They more or less limit the liberty of the individual, or they diminish property to a certain extent. We have few scientifically certain criteria of legislation, and as it often is difficult to mark the line where what is called the police power of the states is limited by the Constitution of the United States, judges should be slow to read into the latter a nolumus mutare as against the lawmaking power.

The substance of the plaintiff's argument is that the assessment takes private property for private use without compensation. And while we should assume that the plaintiff would retain a reversionary interest in its contribution to the fund, so as to be entitled to a return of what remained of it if the purpose were given up (see Danby Bank v. State Treasurer, 39 Vt. 92, 98), still there is no denying that by this law a portion of its property might be taken without return to pay debts of a failing rival in business. Nevertheless, notwithstanding the logical form of the objection, there are more powerful considerations on the other side. In the first place, it is established by a series of cases that an ulterior public advantage may justify a comparatively insignificant taking of private property for what, in its immediate purpose, is a private use. Clark v. Nash, 198 U. S. 361, 49 L. ed. 1085, 25 Sup. Ct. Rep. 676, 4 A. & E. Ann. Cas. 1171; Strickley v. Highland Boy Gold Min. Co. 200 U. S. 527, 531, 50 L. ed. 581, 583, 26 Sup. Ct. Rep. 301, 4 A. & E. Ann. Cas. 1174; Offield v. New York, N. H. & H. R. Co. 203 U. S. 372, 51 L. ed. 231, 27 Sup. Ct. Rep. 72; Bacon v. Walker, 204 U. S. 311, 315, 51 L. ed. 499, 501, 27 Sup. Ct. Rep. 289. And in the next, it would seem that there may be other cases beside the everyday one of taxation, in which the share of each party in the benefit of a scheme of mutual protection is sufficient compensation for the correlative burden that it is compelled to assume. See Ohio Oil Co. v. Indiana, 177 U. S. 190, 44 L. ed. 729, 20 Sup. Ct. Rep. 576, 20 Mor. Min. Rep. 576. At least, if we have a case within the reasonable exercise of the police power as above explained, no more need be said.

It may be said in a general way that the police power extends to all the great public needs. Camfield v. United States, 167 U. S. 518, 42 L. ed. 260, 17 Sup. Ct. Rep. 864. It may be put forth in aid of what is sanctioned by usage, or held by the prevailing morality or strong and preponderant opinion to be greatly and immediately necessary to the public welfare. Among matters of that sort probably few would doubt that both usage and preponderant opinion give their sanction to enforcing the primary conditions of successful commerce. One of those conditions at the present time is the possibility of payment by checks drawn against bank deposits, to such an extent do checks replace currency in daily business. If, then, the legislature of the state thinks that the public welfare requires the measure under consideration, analogy and principle are in favor of the power to enact it. Even the primary object of the required assessment is not a private benefit, as it was in the cases above cited of a ditch for irrigation or a railway to a mine, but it is to make the currency of checks secure, and by the same stroke to make safe the almost compulsory resort of depositors to banks as the only available means for keeping money on hand. The priority of claim given to depositors is incidental to the same object, and is justified in the same way. The power to restrict liberty by fixing a minimum of capital required of those who would engage in banking is not denied. The power to restrict investments to securities regarded as relatively safe seems equally plain. It has been held, we do not doubt rightly, that inspections may be required and the cost thrown on the bank. See Charlotte, C. & A. R. Co. v. Gibbes, 142 U. S. 386, 35 L. ed. 1051, 12 Sup. Ct. Rep. 255. The power to compel, beforehand, co-operation, and thus, it is believed, to make a failure unlikely and a general panic almost impossible, must be recognized, if government is to do its proper work, unless we can say that the means have no reasonable relation to the end. Gundling v. Chicago, 177 U. S. 183, 188, 44 L. ed. 725, 20 Sup. Ct. Rep. 633. So far is that from being the case that the device is a familiar one. It was adopted by some states the better part of a century ago, and seems never to have been questioned until now. Danby Bank v. State Treasurer, 39 Vt. 92; People v. Walker, 17 N. Y. 502. Recent cases going not less far are Lemieux v. Young, 211 U. S. 489, 496, 53 L. ed. 295, 300, 29 Sup. Ct. Rep. 174; Kidd, D. & P. Co. v. Musselman Grocer Co. 217 U. S. 461, 54 L. ed. 839, 30 Sup. Ct. Rep. 606.

It is asked whether the state could require all corporations or all grocers to help to guarantee each other's solvency, and where we are going to draw the line. But the last is a futile question, and we will answer the others when they arise. With regard to the police power, as elsewhere in the law, lines are pricked out by the gradual approach and contact of decisions on the opposing sides. Hudson County Water Co. v. McCarter, 209 U. S. 349, 355, 52 L. ed. 828, 831, 28 Sup. Ct. Rep. 529, 14 A. & E. Ann. Cas. 560. It will serve as a datum on this side, that, in our opinion, the statute before us is well within the state's constitutional power, while the use of the public credit on a large scale to help individuals in business has been held to be beyond the line. Citizens' L. Asso. v. Topeka, 20 Wall. 655, 22 L. ed. 455; Lowell v. Boston, 111 Mass. 454, 15 Am. Rep. 39.

The question that we have decided is not much helped by propounding the further one, whether the right to engage in banking is or can be made a franchise. But as the latter question has some bearing on the former, and as it will have to be considered in the following cases, if not here, we will dispose of it now. It is not answered by citing authorities for the existence of the right at common law. There are many things that a man might do at common law that the states may forbid. He might embezzle until a statute cut down his liberty. We cannot say that the public interests to which we have adverted, and others, are not sufficient to warrant the state in taking the whole business of banking under its control. On the contrary, we are of opinion that it may go on from regulation to prohibition except upon such conditions as it may prescribe. In short, when the Oklahoma legislature declares by implication that free banking is a public danger, and that incorporation, inspection, and the above-described co-operation are necessary safeguards, this court certainly cannot say that it is wrong. State ex rel. Goodsill v. Woodmansee, 1 N. D. 246, 11 L.R.A. 420, 46 N. W. 970; Brady v. Mattern, 125 Iowa, 158, 106 Am. St. Rep. 291, 100 N. W. 358; Weed v. Bergh, 141 Wis. 569, 25 L.R.A.(N.S.) 1217, 124 N. W. 664; Com. v. Vrooman, 164 Pa. 306, 25 L.R.A. 250, 44 Am. St. Rep. 603, 30 Atl. 217; Myers v. Irwin, 2 Serg. & R. 368; Myers v. Manhattan Bank, 20 Ohio, 283, 302; Atty. Gen. v. Utica Ins. Co. 2 Johns. Ch. 371, 377. Some further details might be mentioned, but we deem them unnecessary. Of course, objections under the state Constitution are not open here.

Judgment affirmed.